Question

$\huge \mathcal \red{question: }$
the speed of a car is 72 km/hr. express it in m/s.​

Answer 1

Answer:

72 km/h = 72 * 1000/ 3600 = 20 m/s

1 km ----- 1000 m

1 hour ------ 3600 s

Explanation:

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Answer 2

Explanation:

Have Given :-

$\bold{speed \: of \: a \: car \: is = 72 \: km /hr.}$

$\bold{ = \frac{72 \: km}{1 \: hour}}$

$\bold{ \because \: 1 \: km = 1000 \: m \: }$

$\bold{and \: 1 \: hour = 60 \times 60 \: seconds}$

$\bold{ \therefore \: 72 \: km/hr = \frac{72 \times 10 \cancel{00}}{6 \cancel0 \times 6 \cancel0} }$

$\bold{ = \frac{ \cancel{72} \times 10}{ \cancel6 \times 6} }$

$\bold{ = \frac{ \cancel{12} \times 10}{ \cancel6} }$

$\bold{ = 2 \times 10}$

$\bold{ =20 \: m/s}$

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