Aptitude - Time and Work - Discussion
Discussion Forum : Time and Work - General Questions (Q.No. 3)
3.
A, B and C can do a piece of work in 20, 30 and 60 days respectively. In how many days can A do the work if he is assisted by B and C on every third day?
Answer: Option
Explanation:
| A's 2 day's work = |  |
1 | x 2 |  |
= | 1 | . |
| 20 | 10 |
| (A + B + C)'s 1 day's work = | |
1 | + | 1 | + | 1 | |
= | 6 | = | 1 | . |
| 20 | 30 | 60 | 60 | 10 |
| Work done in 3 days = | |
1 | + | 1 | |
= | 1 | . |
| 10 | 10 | 5 |
| Now, | 1 | work is done in 3 days. |
| 5 |
Whole work will be done in (3 x 5) = 15 days.
Discussion:
357 comments Page 34 of 36.
Divya said:
1 decade ago
Chitra its very clear.
Hamsa said:
1 decade ago
How did you get 6/60 could you please clarify?
Rajasekhar said:
1 decade ago
The question does'nt mean to find the 3 days work how we can solve this for 3 days work?.
Poonam said:
1 decade ago
Please give altarnate methad to solve this question, then we know wether the ans you got is right or wrong.
Manasa said:
1 decade ago
@nikita prasad. You just rock. Good explanation with logic. :-) ).
Karan Singh said:
1 decade ago
Is Vijay's formuala correct? In real aptitude test, the quick formula will be handy and faster to calculate.
Karan Singh said:
1 decade ago
Indeed, the explanation of baskar is correct.
Munish said:
1 decade ago
Thank you Vikas for your information, I have understood.
Samathu said:
1 decade ago
Nice explanation baskar.
Baskar said:
1 decade ago
@chitra
assisted by B and C on every third day
it means A's 2 days + (B&C)'s 1 day
from d 1st explanation u got
Work done in 3 days=(1/10 + 1/10)=1/5
dat is in 3 days=1/5 works
in ques dey ask "In how many days can A do the work"
now cross multiply..
(5*3) days=1 work..
1 work = 15 days...
now u got it ah?
assisted by B and C on every third day
it means A's 2 days + (B&C)'s 1 day
from d 1st explanation u got
Work done in 3 days=(1/10 + 1/10)=1/5
dat is in 3 days=1/5 works
in ques dey ask "In how many days can A do the work"
now cross multiply..
(5*3) days=1 work..
1 work = 15 days...
now u got it ah?
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