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:
300 kmph
360 kmph
600 kmph
720 kmph
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:
146 comments Page 15 of 15.

Pandu said:   1 decade ago
How to give 3/5?

Sree said:   1 decade ago
Hello! Shwetha, You want to take it as comparison of two plan.

First Plan : 240km * 5hr = 1200km/hr
Second Plan: ? *1+(2/3)= 1200km/hr

Shwetha shree said:   1 decade ago
D= S*T that's why 240 * 5.

Srinivasan.S said:   1 decade ago
The distance wants cover with 1+(2/3)hour is 1200km.

1 + (2/3) = (3+2)/3 = 5/3.

speed=Distance/time
speed=1200km/(5/3)
speed=1200km*(3/5)
speed=720km/hr

Mohit said:   1 decade ago
It is (3*1)+2=5

So it 5/3 hours and now speed = distance/time that's why 3/5.
(3)

Vino said:   1 decade ago
How to give 3/5 ?


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