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# A taken 3 hours more than B to walk 30 km. But if A doubles his pace, he is ahead of B by  hours. Find their speed of walking.

Asked by Topperlearning User 9th August 2017, 9:32 AM

Let speed of  km/hr.

and  km/hr.

Therefore according to the question we get two equation.

……..(1)

……..(2)

Now Let

Then equation (1) and (2) becomes

or                ……..        (3)

…….. (4)

Adding (3) and (4) we get

Putting this value of A in (3) we get

But

and

Hence speed of A is  km/hr and B is 5 km/hr.

Answered by Expert 9th August 2017, 11:32 AM
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