Question

David and Jason started a journey of distance 110 km. If David takes 22 minutes more than Jason,

who is travelling at 60 kmph, calculate the speed of David.

A. 40 kmph

B. 50 kmph

C. 60 kmph

D. 70 kmph
​

Answer 1

The correct answer is option (d) 70 kmph.

Given,

David and Jason started a journey of a distance of 110 km.  David takes 22 minutes more than Jason, who is traveling at 60 km/h.

To Find,

The speed of David.

Solution,

Let us assume that the time taken by Jason is x hrs.

So, the time taken by David will be x+22/60 hrs.

Now, we know that

Speed = Distance/time

Speed of Jason = 110/(x)

60 = 110/x

x = 110/60

x = 1.83 hrs

Now, speed of David = 110/(1.83+22/60)

Speed of David = 70 kmph.

Hence, the speed of David is 70 kmph.

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