Question

13 multiple choice 1 point a racehorse is running with a uniform speed of 69 km/hr along a straight - way. what is the time it takes for the horse to cover 400 meters? 27.6 hours 2.1 minutes 0.35 hours 21 seconds clear my selection

Explanation:

Step1: Convert speed to m/s

First, convert 69 km/h to m/s. 1 km = 1000 m and 1 h=3600 s. So, $v = 69\times\frac{1000}{3600}\text{ m/s}\approx19.17\text{ m/s}$.

Step2: Use the formula $t=\frac{d}{v}$

We know distance $d = 400$ m and speed $v\approx19.17$ m/s. Then $t=\frac{400}{19.17}\text{ s}\approx21\text{ s}$.

Answer:

21 seconds