Question

The speed of a car is 72 km h^-1 Express it in ms^-1
Ans. 20 ms^-1​

Answer 1

Answer:

Hey friend..!! here's your answer

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The speed of car is 72 kmh-1

1km = 1000 m

1hr = 60 min = 3600 s

First , convert kmh into ms

1 km / hr = 1000 / 3600 m/s

1km / hr= 5 / 18 m/s

So , 72 kmh = 72 × (5/18) ms-1

= (4 × 5 )ms-1

= 20 ms-1

Answer : 20ms-1

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#Hope its help