Robert is travelling on his cycle and has calculated to reach point A at 2 P.M. if he travels at 10 kmph, he will reach there at 12 noon if he travels at 15 kmph. At what speed must he travel to reach A at 1 P.M.?
A.
8 kmph
B.
11 kmph
C.
12 kmph
D.
14 kmph
Answers
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3
let the distance be d and time taken at the speed of 10 kmph be t
d/t=10
d/(t-2)=15
(t-2)/t=2/3
t=6
d=60
d/(t-1)=60/5=12kmph
ans=c
d/t=10
d/(t-2)=15
(t-2)/t=2/3
t=6
d=60
d/(t-1)=60/5=12kmph
ans=c
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