# A boy runs at a speed of 20 m/s.How much time will he take to cover a distance of 1 km?

##### 2 Answers

Nov 15, 2016

I got

#### Explanation:

1 km corresponds to

we can rearrange and get:

Dec 3, 2016

It will take 50 seconds to run 1000 metres

#### Explanation:

Using ratio in the fraction style format

Given:

We need 1 km which is the same as 1000m

Let the unknown time in seconds be

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To change 20 into 1000 multiply by 50

If you multiply by 1 you do not change the value. However, 1 can come in many forms.

It will take 50 seconds to run 1000 metres