Convert $72 k m / h r$ _.into $m / s .$

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Solution

Step 1: Given Data:
Speed of an object, $72 k m / h r$
Step 2: conversion of unit:
$1 k m / h = \frac{1 k i l o m e t r e}{1 h o u r} = \frac{1000 m e t e r}{3600 s e c} = \frac{5}{18} m / s$
As we know $1 k m / h = \frac{5}{18} m / s$
So, $72 k m / h r = \frac{5}{18} \times 72 = 20 m / s$
Hence, $72 k m / h r = 20 m / s$

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