Question

in kilometre race A beats b by 30 metres or by 5 seconds what is the time taken by a over the course​

Answer 1

Answer:

6METER PER SECOND

Step-by-step explanation:

Answer 2

The time taken by A over the course is 160 seconds.

Given:

A beats B by 30 metres or by 5 seconds.

To Find:

The time taken by A over the course​?

Solution:

Since A beats B by 30 meters that means A has already traveled 30 meters and B has to cover this distance. B will finish the race after 5 seconds. So, the speed of B is,

$S_B=\frac{30}{5}\\ =6\,\,{\rm m/s}$

Let, 1000m is the total distance that has to be covered in the race. As B is 40 m behind A so, B has traveled,

$1000-40=960\,\,{\rm m}$

And the time taken by B to travel 960 m is,

$\frac{960}{6}=160\, {\rm s}$

This is the time at which A has already covered the distance.

Thus, the time taken by A over the course is 160 seconds.