Question

In a kilometer race, A beats B by 60 meters or by 7 seconds. What is the time taken by A over the course?
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Answer 1

Answer:

time taken by A is 116.6666666669

Answer 2

The time taken by A over the course is 109.3 s

Step by step explanation

Given length of the track = 1 km

Distance = speed x time

A beats B by 60 m or 7 seconds that is B covers 60 m in 7 seconds.

Speed of B = $\frac{60}{7} =8.6 m/s$

Then time to cover 1000 m = $\frac{1000}{8.6} =116.3 s$

If A reaches 7 seconds earlier then, time taken by A over the course is

$116.3 - 7 = 109.3s$

So time taken by A over the course is 109.3 s.