Question : A runner runs a 750-metre race in 54 seconds. Find the runner’s speed (in km/hr).
Option 1: 40
Option 2: 30
Option 3: 14
Option 4: 50
Answer (1)
4th Jan, 2024
Correct Answer: 50
Solution :
Given: A runner runs a 750-metre race in 54 seconds.
$\text{Speed}=\frac{\text{Distance}}{\text{Time}}$
The runner’s speed = $\frac{750}{54}$ m/s
Convert m/s into km/h by multiplying with $\frac{18}{5}$,
$\frac{750}{54}$ m/s = $\frac{750}{54}\times \frac{18}{5}$ km/hr = 50 km/hr
Hence, the correct answer is 50 km/hr.
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