Question

A man takes 4 hours 20 minutes in walking to a certain place and riding back. If he walks on both sides, he loses 1 hour. The time he would take by riding both ways is

Accepted Answer

C. Let $W$ be time taken to walk one way and $R$ be time taken to ride one way. $$W + R = 4	ext{ hrs } 20	ext{ min} = 260	ext{ mins}$$ Walking both ways takes 1 hour more = $5	ext{ hrs } 20	ext{ min} = 320	ext{ mins}$. $$2W = 320 \implies W = 160	ext{ mins}$$ Thus, $R = 260 - 160 = 100	ext{ mins}$. Riding both ways $= 2R = 200	ext{ mins} = 3	ext{ hours } 20	ext{ min}$.

Walking and Riding Time Calculation

Explanation

Practise this under exam conditions