Question

Aboy
runs at a speed of 8 m/s
How long he take to
cover a distence of 2km.​

Answer 1

Given :

• Speed = 8 m/s

• Distance =2 km

To find :

• time taken by boy to cover 2 km with speed 8 m/s

Formula used :

$\sf \large s = \dfrac{d}{t}$

where:-

• s = speed
• d = distance
• t = time

Solution :

Speed by which boy is running = 8 m/s

Distance covered =2 km

we know that 1 km = 1000 m

therefore, 2 km = 2000 m

Let time be t seconds.

$\sf \implies 8 = \dfrac{2000}{t}$

$\sf \implies 8 \times t= \dfrac{2000}{1}$

$\sf \implies t= \dfrac{2000}{8}$

$\sf \implies t= 250 \: s$

Answer :

Time taken by boy to cover 2 km with speed 8 m/s = 250 seconds

__________________

Learn more :

$\sf 1km = 100000cm$

$\sf 1km = 1000000mm$

$\sf 1km = 1000m$

$\sf 1m = \dfrac{1}{1000} km$

$\sf 1cm = \dfrac{1}{100000} km$

$\sf 1mm = \dfrac{1}{1000000} km$

$\sf 1m = 100cm$

$\sf 1m = 1000mm$

$\sf 1cm = \dfrac{1}{100} m$

$\sf 1mm = \dfrac{1}{1000} m$