A body covers 2 5 th of the total distance with speed v 1 and 3 5 th with v 2 . The average speed of the body will be

Question

A body covers 2 5 th of the total distance with speed v 1 and 3 5 th with v 2 . The average speed of the body will be, 5 v 1 v 2 3 v 1 + 2 v 2, v 1 + v 2 2, 1 2 v 1 v 2, 2 v 1 v 2 v 1 + v 2

MARKS App · Accepted Answer

Let the total distance is x , then we have t 1 = 2 5 x v 1 and t 2 = 3 5 x v 2 Since, average speed, v a v = total distance total time = x t 1 + t 2 = x 2 x 5 v 1 + 3 x 5 v 2 = 5 v 1 v 2 3 v 1 + 2 v 2 ∴ v a v = 5 v 1 v 2 3 v 1 + 2 v 2

Search any question & find its solution

Looking for more such questions to practice?