A) 36 km/h
B) 48 km/h
C) 72 km/h
D) 96 km/h
Correct Answer: D
Solution :
\[\text{Speed=}\frac{\text{Total distance travel }\!\!~\!\!\text{ }}{\text{Time taken}}=\frac{400}{15}m/s\] \[=\frac{400}{15}\times \frac{18}{5}km/h=96\,\text{km/h}\]
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