A) 420 metre
B) 630 metre
C) 315 metre
D) 525 metre
Correct Answer: D
Solution :
Relative speed of policeman with respect to thief = (9 - 7) kmph = 2 kmph \[=\left( 2\times \frac{5}{18} \right)\] metre / second \[=\frac{5}{9}\]metre / second \[\therefore \] Time taken in catching the thief \[=\frac{\frac{150}{5}}{9}=\left( \frac{150\times 9}{5} \right)\]seconds = 270 seconds \[\therefore \]Distance covered by thief = speed \[\times \]time \[\text{=speed }\!\!\times\!\!\text{ time}\] \[=\left( \frac{7\times 5}{18}\times 270 \right)\]metre = 525 metreYou need to login to perform this action.
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