Question

A man takes $150$ steps in walking $120$ meters. Find his speed in km/hr , if he takes $3$ steps in one second.

• A. $8.64$ km/hr
• B. $9.39$ km/hr
• C. $5.82$ km/hr
• D. $4.77$ km/hr

Answer 1

The correct option is A $8.64$ km/hr

Since man takes $3$ steps in one second.
Therefore, time taken by man in $150$ steps $=\frac{150}{3}=50$ seconds $=\frac{50}{3600}hr$
$\therefore Speed=\frac{distance}{time}=\frac{120}{50}m/s=\frac{\frac{120}{1000}}{\frac{50}{3600}}=\frac{120}{1000}\times \frac{3600}{50}=8.64$ $km/hr$.