Question

How many minutes does Arun take to cover a distance of 400 metres if he runs at a speed of 20 km per hour

Answer 1

Answer:

$\red { Time } \green {=1.2\: minutes }$

Step-by-step explanation:

$Speed \: of \: Arun (s) = 20 \:km/hr\\= 20\times \frac{1000\:m}{60\: minutes } \\= \frac{1000}{3} \:m/minutes$

$Distance \: travelled (d) = 400 \:m$

$Time (t)= \frac{d}{s}\\= \frac{400}{\frac{1000}{3}}$

$= 400 \times \frac{3}{1000} \\= \frac{12}{10}\\= 1.2 \: minutes$

Therefore.,

$\red { Time } \green {=1.2\: minutes }$

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