A) 6 km/h
B) 7.5 km/h
C) 12 km/h
D) 15 km/h
Correct Answer: C
Solution :
Let the increased speed be \[\text{x km}/\text{h}\] Then distance covered at a speed of \[\text{48 km}/\text{h}\]distance covered at a speed of \[\text{48 km}/\text{h}\] \[\Rightarrow \] \[48\times 10=x\times 8\] \[\therefore \] \[x=\frac{48\times 10}{8}=60km/h\] Increase in speed \[=\left( 60-48 \right)=12km/h\]You need to login to perform this action.
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