A student walks from his house at 2 ½ km/hr and reaches his school late by 6 M

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A student walks from his house at 2 ½ km/hr and reaches his school late by 6 Minutes. Next day, he increases his speed by 1km/hr a reaches 6 minutes before school time. How far is the school from his house?

Options:

A . (5/4) km

B . (7/4)km

C . (9/4)km

D . (11/4)km

Answer: Option B

Let the required distance be x km, then
=>
=> 2x/5 “ 2x/7 = 1/5
=> 14x “ 10x = 7
=> 4x= 7
=> X = 7/4
Required distance = 7/4km

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