A boy takes 20 minutes to reach the school at an average speed of 12 km/hour. If he wants to reach the school in 15 minutes, his average speed (in km/hour) will be
16
18
17
19
A
16
B
17
C
18
D
19
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Solution
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The correct option is A 16 A boy takes 20min to reach the school at an average speed 12km/hr.
Let he takes 15min to reach the school at an average speed xkm/hr.
Therefore,
20×12=15×x
x=16km/hr
Hence, this is the answer.
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