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Question
Walking 7/6 of his usual rate, a boy reaches his school 4 min early. Find his usual time to reach the school?
Options:
A .  25 min
B .  26 min
C .  27 min
D .  28 min
Answer: Option D


Speed Ratio = 1:7/6 = 6:7

Time Ratio = 7:6

1 -------- 7


         4 --------- ? ¨ 28 m



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