Two girls move in opposite directions, one from A to B and the other from B to A. The girl from A reaches the destination in 12
minutes. The girl from B stops on the way for 10 minutes and reaches her destination in 25 minutes. If A's speed is 5 km/h,
then what is the speed of B?
This questions was previously asked in
SSC MTS 13th October 2021 Shift-2
1/7 km/h
Incorrect Answer2.4 km/h
Incorrect AnswerExplanation:
- The girl from A to B completes the journey in 12 minutes at 5 km/h. Converting 12 minutes to hours, she travels for 12/60 = 0.2 hours. Therefore, the distance AB = 5 km/h x 0.2 hours = 1 km.
- The girl from B to A takes 25 minutes, which includes a 10-minute break. Thus, she travels for 15 minutes or 15/60 = 0.25 hours.
- To cover the same 1 km distance in 0.25 hours (actual traveling time), B's speed should be 1 km / 0.25 hours = 4 km/h.
- Option 3: 4 km/h is the correct speed for B.
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By: santosh