### Discussion :: Chain Rule - General Questions (Q.No.6)

Ranjan said: (Oct 20, 2010) | |

Comapare these two No. 5 and 6 please clear me. I don't understand these two question. |

Shaunak said: (Nov 28, 2010) | |

Take the problem in the following way:. A man can complete 5/8 of a work in 10 days. How long does it take to complete 3/8 of the same work? |

Mr.Romana said: (Jan 27, 2011) | |

Its so simple... work done in one day:5/8*10=1/16 remaining work is:1-5/8=3/8 3/8*8/3=1/6 1/6+1/6+1/6+1/6+1/6+1/6=1 it means the remaining work can be done in 6 days |

M.V.Krishna said: (Mar 19, 2011) | |

work days 5/8 10 8/8 x 5x/8=10 x=16 total work 16 days remaining to do = (16-10) days = 6 days |

Chandrasekar said: (Jun 8, 2011) | |

Remaining work is:1-5/8=3/8 I cant understand this step, someone explain ? |

Mini said: (Jul 18, 2011) | |

Total work of job= 8 Out of 8 he does 5 in 10 days (given in the question) so 5 work of a job= 10days Therefore, 1 work of a job= 10/5= 2days Now remaining days are(8-5)=3days So 3 work of a job=3*2=6 days. |

Priyanka said: (Aug 15, 2011) | |

@Chandrasekar Its too simple logic.. Consider the work done be 1. They have completed 5/8 of work. So remaining is 1-(5/8)=(8-5)/8=3/8 |

Bhadra said: (Aug 15, 2011) | |

Very easy For 5 parts work he takes 10days for 3 parts ? 3*10/5=6days |

Avijeet said: (Sep 4, 2011) | |

Hey guys its very easy... 5/8 work can be done in 10 days So 1 work can be done in 10/(5/8) days=10*8/5=16 days Hence remaining(1-5/8=3/8)work can be done in 16*3/8 =6 days |

Chalam said: (Dec 26, 2011) | |

Bhadra & Avijeet, Nice explanations. Thanks |

Shahid said: (Apr 20, 2012) | |

It can be solved this way also To complete 5/8 part --- 10 days To complete 8/8 parts ---- ? days Solving, {(8/8) x 10}/{5/8} = 16 days Therefore remaining days = 160- 10 = 6 days |

Sourabh said: (Aug 17, 2012) | |

@bhadra hey nice explaination, thanks it helped me alot |

Mithilesh Kumar said: (Aug 30, 2013) | |

In 1 day (5/8)/10 = 0.0625 part work is done. Hence, No.of days taken to complete this = 1/0.0625 = 16. Remaining days = 16-10 = 6. |

Satish said: (Sep 5, 2013) | |

5/8 job = 10 days. 1 job = 10*8/5 = 16. Remaining days = 16-10 = 6. |

Sonu said: (Jan 9, 2014) | |

Job Day(s). 5/8 10 1/8 10/5=2 8/8 (i.e.=1) 2X8=16 Remaining Days = 16-10 = 6. |

Ruk said: (Apr 23, 2014) | |

From 8/8 of total work, 5/8 part done in 10 days. For one part he took 2 days. 10/5 = 2. Then balance 3/8 part he will take. 3x2 days = 6 days. |

Sankar said: (Dec 3, 2014) | |

A's 10 days work 5/8. Then A's one day 5/10 = 0.50. Remaining work 3/8. So 2 days 1 work over. Therefore remaining work is 3*2 = 6 days remaining over. |

Gaurav Pant said: (Jul 29, 2015) | |

5/8 work completed in 10 days. Total work will complete = 10*(8/5) = 80/5 = 16. Therefore remaining work (1-5/8) done on = 16-10 days = 6 days. |

Kathik said: (Jan 27, 2016) | |

Given that 5/8 (job) = 10 days. Then for full job completion take: 1(job) = 10(8/5). = 16 days. So in question asked how many remaining days to finish the job. So Total days - Given days. = 16 - 10 = 6 days. |

Bindu Brisk said: (Mar 17, 2016) | |

It's so simple: Total of 8 parts 5 parts done in 10 days: Remaining 3 parts in 6 days: 1 part = 2 days. |

Gokul Raj said: (May 24, 2016) | |

The work of 5 parts done in 10 days. So, 10/5 = 2 days of time taken to complete one part. Then, 5/8 has 3 remain parts 3 * 2(days) = 6 days. Thank you. |

Ram said: (Jun 30, 2016) | |

Total work of job = 8, Out of 8 he does 5 in 10 days (given in the question). So, 5 work of a job = 10 days, Therefore, 1 work of a job = 10/5 = 2 days, Now remaining work are (8-5) = 3, 1 work = 2 days, So, 3 work of a job = 3*2 = 6 days. (2+2+2). |

Pavan Power Star Pk Fan said: (Jul 22, 2016) | |

He takes 10 days to complete 5/8 of the job. In 1 day he does 5/80 of job. If the job is complete then fraction will become 1.So (work done in 1 day) * (no. of days ) = 1. Then, the number of days = 16. But he did 10 days work already so the remaining days needed to complete the job is 6 days. |

Zareena said: (Jun 7, 2017) | |

5/8 job = 10 days, 1 job = 10 * 8/5, 1 job = 16 days, 16 - 10 days = 6 days. |

Ram said: (Jul 7, 2017) | |

Look another eg; 1/2 work = 5 day Then, Getting completed ie, LHS should be 1. cross multiply. ie 1=2*5. =10days. Similarly, 5/8=10. 1= 8/5*10. = 16. |

Sowmiya said: (Sep 2, 2017) | |

Very nice explanation @Bhadra. |

Shubham said: (Mar 9, 2018) | |

A garrison of 750 men has provision for 20 weeks if, at the end of 4 weeks, they are reinforced by 450 men, how long the provision will last? How to solve this by using the chain rule? Please help me. |

Venkat Ravi said: (May 16, 2018) | |

Consider a job value is 100(not given). 8/3 of work is done in 10 days then, (8/3)*100 = 62.5(ie.,62.5% of work is completed in 10 days then the remaining work will be 37.5). For 10 days 67.5. For single day=(67.5/10)=6.75(ie.,per day work). Remaining days=(remaining work/per day work) = (37.5/6.75) = 6 days. |

Rajan said: (Mar 25, 2019) | |

He completed 5 jobs out of 8, in 10 days so that means he completed 1 job in 2 days and to complete 3 more jobs (8-5=3) and he will take 6 days (3x2=6). |

Pujan Das said: (Apr 22, 2019) | |

5/8 is completed in 10 days. Hence, 1 (100%) will be completed in (10*8)/5 = 16 days. The rate of work remains constant. (important point). Thus, Remaining days = total days - elapsed = 16 - 10 = 6 days. |

Jefferson said: (May 9, 2019) | |

5/8 of the work is completed in 10 days. So we get the remaining work = (1-5/8). = 3/8. Completing work is directly proportional to days. Hence direct proportion where x/y = constant. Let we take the time taken to complete 3/8 be x. And therefore = 10/(5/8) = 16, for 3/8=8x/3, thus 8x/3=16, 8x = 48, and x = 6days. |

Gagan said: (Sep 12, 2020) | |

5/8 of the work could be completed in 10 days. So, full work could be completed in 10*8/5 = 16 days. Extra days = 16 -10 = 6 days. |

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