Question

The distances covered by each of two runners during the first 21 minutes of a race are

​shown in the graph below. The time at which one runner passes the other is between
​​

Answer 1

It's either 10.5 or 11

Explanation:

Answer 2

t = 10.5 minutes

Explanation:

Curves on the graph show the distance covered by two runners during the first 21 minutes of a race.

These curves intersect each other at a point which shows a common location of both the runners on the graph.

This common point is at the mid of t = 9 and 12 seconds

Therefore, time at which both the runners passes the other will be,

t =
`9+(12-9)/(2)`

= 9 + 1.5

= 10.5 minutes