I drove 60 km at 30 kmph and after that an extra 60 km at 50 km ph. Register my normal speed over my 120 km. A) 34 KM/HR B) 37 ½ KM/HR C) 42 KM/HR D) 35 ½ KM/HR

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I drove 60 km at 30 kmph and after that an extra 60 km at 50 km ph. Register my normal speed over my 120 km.

A) 34 KM/HR
B) 37 ½ KM/HR
C) 42 KM/HR
D) 35 ½ KM/HR

SimplyFreshers Changed status to publish March 28, 2022
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Answer: B
Solution:
37 ½ km ph Solution: Time required for the initial 60 km = 120 min. The Time required for the second 60 km = 72 min. Add up to time required = 192 min Average speed = (60*120)/192 = 37 1/2