7. 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.?
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A. 11 kmph
B. 8 kmph
C. 14 kmph
D. 12 kmph