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Question

If Ram travels to his school from his house at the speed of 3 km/hr, then he reaches the school 5 minutes late. If he travels at the speed of 4 km/hr, then he reaches the school 5 minutes earlier than school time. The distance of his school from his house is

A
1 km
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B
2 km
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C
4 km
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D
6 km
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Solution

The correct option is B 2 km
Let the distance between school and house be x km.
The difference of time =10 minutes =1060 hour
Now, x3x4=1060
x12=16
x=2
Hence, the distance of his school from his house is 2 km.

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