Walking \[{{R}_{1}}%\] th of his usual rate, a boy reaches his school – McqOptions

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1.	Walking \[{{R}_{1}}%\] th of his usual rate, a boy reaches his school 4 minutes early. Find his usual time to reach the school.
A.	40min
B.	32min
C.	28min
D.	48min
Answer» D. 48min

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