Question

A man riding his bicycle covers 75 metres in 12.5 seconds. What is his speed (in km/hr)?

• A. 21.6
• B. 15.5
• C. 11.1
• D. 6

Answer 1

Answer:

A. 21.6

Distance = 75 m
Time = 12.5 s

Find speed in m/s

$\text{Speed} = \frac{75}{12.5} = 6 \text{ m/s}$

Convert m/s to km/hr

$1 \text{ m/s} = 3.6 \text{ km/hr}$

$6 \times 3.6 = 21.6 \text{ km/hr}$

Final Answer: 21.6 km/hr