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A student goes to school at the rate ...

A student goes to school at the rate of `2 1/2` km/h and reaches 6 min late. If he travels at the speed of 3km/h he is 10 min early. What is the distance to the school ? a. 5km b. 1 km c. `3 1/4k m` d. `3 1/2k m`

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