While walking from home to school, $Sam$ takes 70 steps per minute. $Sam$ increased his walking pace by 10% on the way back. What is his walking pace (steps per minute) on his way home from school?

63

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77

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71

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80

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Solution

The correct option is B $77$
Walking pace from home to school $= 70$ steps per minute
The percentage increase in walking pace from school to home $= 10$ %
$⟹ 10$ % of $70$ will give the increased walking pace.
So,
increased walking pace $= \frac{10}{100} \times 70$
$= 7$ steps per minute
Hence, walking pace on his way home from school is $77 (= 70 + 7)$ steps per minute.

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While walking from home to school, Sam takes 70 steps per minute. Sam increased his walking pace by 10% on the way back. What is his walking pace (steps per minute) on his way home from school?

While walking from home to school, $Sam$ takes 70 steps per minute. $Sam$ increased his walking pace by 10% on the way back. What is his walking pace (steps per minute) on his way home from school?