Aptitude - Time and Distance - Discussion
Discussion Forum : Time and Distance - General Questions (Q.No. 2)
2.
An aeroplane covers a certain distance at a speed of 240 kmph in 5 hours. To cover the same distance in 1
hours, it must travel at a speed of:
hours, it must travel at a speed of:Answer: Option
Explanation:
Distance = (240 x 5) = 1200 km.
Speed = Distance/Time
Speed = 1200/(5/3) km/hr. [We can write 1 hours as 5/3 hours]
 Required speed = |
 |
1200 x | 3 |  km/hr |
= 720 km/hr. |
| 5 |
Discussion:
162 comments Page 13 of 17.
Vijay said:
1 decade ago
Speed = distance/time.
Distance = same.
Speed S1 = 240, Speed S2=?
Time t1 = 5hours, time t2 = 3/5hours.
S1/S2 = t2*t1.
240/S2 = (3/5)/5.
S2 = 720 kmph.
Distance = same.
Speed S1 = 240, Speed S2=?
Time t1 = 5hours, time t2 = 3/5hours.
S1/S2 = t2*t1.
240/S2 = (3/5)/5.
S2 = 720 kmph.
Veeresh said:
1 decade ago
Why we should write 5/3 as 3/5?
Sukumar said:
1 decade ago
By dividing 3/5 why I am not getting 0.6 how to do it?
Rajesh said:
1 decade ago
Total distance covered in 5 hrs = (240*5) = 1200 kms.
We have to cover 1200 kms in 1(2/3)hrs, which is 100 min.
Therefore for 1 min we should cover (1200/100) = 12 kms.
For 60 min(1hr) = (12*60) = 720.
We have to cover 1200 kms in 1(2/3)hrs, which is 100 min.
Therefore for 1 min we should cover (1200/100) = 12 kms.
For 60 min(1hr) = (12*60) = 720.
Rosy said:
1 decade ago
Hi friends, here in question they given as time for 1 hr, but all you guys taking as 5/3, why?
Govindraj said:
1 decade ago
Shortcut:
Because Distance traveled by Aeroplane is Same with different speed.
If speed ratio is "a:b" then time ratio will be "b:a" for same distance. So,
240:x = (5/3) :5 here 1 to the 2/3 = 5/3.
240:x = 1/3.
x = 240*3 = 720.
Because Distance traveled by Aeroplane is Same with different speed.
If speed ratio is "a:b" then time ratio will be "b:a" for same distance. So,
240:x = (5/3) :5 here 1 to the 2/3 = 5/3.
240:x = 1/3.
x = 240*3 = 720.
Sudharsan madurai said:
1 decade ago
1(2/3) = 1.66.
5 hours/1.66hours *240 km/ph = 720 km/ph.
5 hours/1.66hours *240 km/ph = 720 km/ph.
Payal Gupta said:
1 decade ago
Distance = (240*5) = 1200km.
Speed = Distance/Time.
Speed = 1200/(5/3) km/hr.
= 1200*3/5.
= 720 km.
Speed = Distance/Time.
Speed = 1200/(5/3) km/hr.
= 1200*3/5.
= 720 km.
Mona said:
1 decade ago
1 2/3 is a mixed-fraction so 1st we have to multiply denominator with which is in-front of fraction & add it to numerator then we will get a 5/3.
Ruchi said:
1 decade ago
Please explain me 5/3 hrs. How it converts?
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