Question

CHECK YOUR UNDERSTANDING
A man covers a distance of 600 m in 2 min. 30 sec. What will be the speed in km/h?​

Answer 1

Answer:

14.4 km/hr

Step-by-step explanation:

600 m in 2min30sec ,i.e. 600 m in 150 seconds.

In 1 second he covers 600/150= 4 meters.

So, his speed is 4m/s

To convert meter/second into km/hr, multiply this value by 18/5 or 3.6.

4 * 18/5 = 14.4.

So the speed of the man is 14.4 km/hr.

Hope it helps!!!

Answer 2

Given:

A man covers a distance of 600m in 2 min. 30 sec.

To find:

The speed of the man in km/h

Solution:

The speed of the man is 14.4 km/hr.

To answer this question, we will follow the following steps:

First of all, we should know that if an object travels or covers distance 'd' in time 't' then its speed is given by:

$= \frac{d}{t}$

Now,

proceeding to the solution, we have

Distance covered by man

$= 600 \: m$

$= \frac{600}{1000} km$

$= \frac{3}{5} km$

(as 1 km = 1000 m)

The time that was taken by the man to cover 600m distance = 2 min. 30 sec.

$= \frac{2}{60} + \frac{30}{60 \times 60}$

(as 1 hour = 60 minutes = 60 × 60 sec = 3600 seconds)

$= \frac{1}{24} \: seconds$So,

Speed of the man in km/hr

$= \frac{ \frac{3}{5} }{ \frac{1}{24} }$

$= \frac{3 \times 24}{5}$

$= \frac{72}{5}$

$= 14.4 \: km \: per \: hour$

Hence, the speed of the man is 14.4 km/hr.