0ne day a boy walked from his house to his school at a speed of 4 kilometre per hour and he reached 10 minutes late to the school. Next day he ran at a speed of 8 kilometre per hour and was 5 minutes early to the school ; find the distance between his house and school.
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Pallavi beats Anuva in a kilometre race by 50 s and
Richa by 450 m. If Anuva and Richa run a kilometre
race, Anuva wins by 40 s. How much time does Richa
take to run a kilometre?
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