Question
Robert is travelling on his cycle and has calculated to reach point A at 2 p.m. . if he ravels at 10 kmph ; he will reach
here at 12 noon if he travels at 15 mph at what speed must he travel to reach A at 1 p.m.
Answer: Option C
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Let the distance travelled be `x` km
Then , `x/10 - x/15 = 2 hArr 3x - 2x = 60 hArr x = 60`
Time taken to travel 60 km at 10 km/hr = `(60/10)hrs = 6 hrs`
So, Rebert started 6 hours before 2 P.M. i.e. at 8 A.M.
`:.` Required speed = `(60/5)` kmph = 12 kmph.
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