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A boy walks from his house to school at ...

A boy walks from his house to school at 2.5 km/hr and arrives 12 minutes late. The next day he walks at 4 km/hr and reaches the school 15 minutes earlier. What is the distance from his house to school ?

A

2 km

B

2.5 km

C

3 km

D

3.5 km

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