A and B runs around a circular track.

A and B runs around a circular track. A beats B by one round or 10 minutes. In this race, they had completed 4 rounds. If the race was only of one round, find the A's time over the course:

Quiz

Answer/Solution

7.5 min

Steps/Work

Explanation:
B runs around the track in 10 min.
i.e , Speed of B = 10 min per round
A beats B by 1 round
Time taken by A to complete 4 rounds
= Time taken by B to complete 3 rounds
= 30 min
A's speed = 30/4 min per round
= 7.5 min per round
Hence, if the race is only of one round A's time over the course = 7 min 30 sec
Answer: B

Physics Calculator / Auto Solver

A and b runs around a circular track. A beats b by one round or minutes. In this race, they had completed rounds. If the race was only of one round, find the a's time over the course :

Calculated Answer

7.5

Step by Step Solution

In order to solve problem, you must evaluate (n0 * (n1 - 1)) / n1.

n0 =10
n1 =4