Question
A boy runs 20 km in 2.5 hours. How long will he take to run 32 km at double the previous speed ?
Answer: Option D
Answer: (d)Using Rule 1,The boy covers 20 km in 2.5 hours.Speed = $20/{2.5}$ = 8 km/hr.New speed = 16 km/hrTime = $32/16$ = 2 hours.
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Answer: (d)Using Rule 1,The boy covers 20 km in 2.5 hours.Speed = $20/{2.5}$ = 8 km/hr.New speed = 16 km/hrTime = $32/16$ = 2 hours.
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