Home » Aptitude » Speed, Time and Distance » Question
  1. Ram starts his journey from Bombay to Pune and simultaneously Mohan starts from Pune to Bombay. After crossing each other they finish their remaining
    journey in 6
    1
    and 4 hours respectively.
    4
    What is Mohan’s speed if Ram’s speed is 20 km per hr. ?
    1. 28 kmph
    2. 24 kmph
    3. 25 kmph
    4. 30 kmph
Correct Option: C


Suppose that Ram and Mohan meet at A. Let Ram’s speed be x km per hr. and Mohan’s speed be y km per hr.

Then AP =
25
x km
x

and AB = 4y km.
Now, time taken by Ram in going from
B to A =
4y
x

and the time taken by Mohan in going from
P to A =
25x
.
4y

Obviously time taken is equal
∴ 
4y
=
25x
x4y

⇒  16y2 = 25x2
⇒ 
y2
=
25
x216

⇒ 
y
=
5
x4

⇒  y =
5
x
4

Here, x = 20 km per hr.
∴  y = Mohan’s speed
=
5
× 20 = 25 km per hr.
4



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