A man drives at a speed of 40 miles/hr. His wife left 30 mins. late with 50 miles/hr speed. when will they meet ?\nOptions:\n(A) 1 hours\n(B) 2 hours\n(C) 3 hours\n(D) 4 hours\n(E) 5 hours
Let's be accurate as possible and think first.
(B)
In 30 minutes the man would have droven 20 miles, when his wife starts.

Now both are driving in the same direction.

So speed of wife related to man is 10(50-40) miles/hr.

So wife will cover 20 miles in 2 hours to meet the man.

.

The answer is (B)