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A student walks from his house at ...

A student walks from his house at ` 2 (1)/(2)` km /h and reaches his school late by 6 min . Next day increase his speed by 1 km/h and reaches 6 min before school time reaches 6 min before school time . How far is the school form his house ?

A

`frac(5)(9) km`

B

`frac(7)(4) km`

C

`frac(9)(4) km`

D

`frac(11)(4) km`

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