a swimming pooli s 100 m long . A boy can swim across the length of the pool and then return to his position in 8 minutes. What is his speed in km/hour?

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Solution

Dear student,

$T o t a l d i s \tan c e = 100 + 100 = 200 m T i m e = 8 m i n S p e e d = \frac{D i s \tan c e}{T i m e} S p e e d = \frac{200}{8} S p e e d = 25 m / m i n S p e e d = \frac{(25 \times 60)}{1000} k m / h r S p e e d = \frac{60}{40} k m / h r S p e e d = 1.5 k m / h r T h u s h i s s p e e d i n k m / h r i s 1.5$

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