Question

The Speed Of A Moving Car Is 20m/s.Calculate The speed At km/hr​

Answer 1

Answer:

Answer: 20m\s = 20(18/5)km/h = 4 x 18 = 72km/h

Step-by-step explanation:

Solution:

1 km = 1000m ⇒ 1m = 1/(1000)m

1 hr = 3600 sec ⇒ 1 sec = 1/ (3600) hr

Now,

$\small \Rightarrow 20 m/s =\frac{20m}{1\ s} =\frac{20\times\frac{1}{1000}m}{1\times \frac{1}{3600}s} = \frac{20\times3600}{1000}$

72km/hr

Note: While converting from m/s to km/hr we can directly multiply by the fraction (18/5)