Walking 7/6 of his usual rate, a boy reaches his school 5 min early. Find his usual time to reach the school?
Choose the correct option:  A) 22  B) 28  C) 99  D) 35  E) 66
Speed Ratio = 1:7/6 = 6:7   Time Ratio = 7:6   1 -------- 7   5 --------- ?   = 35 m   Answer:35
<result>D</result>
Walking 7/6 of his usual rate, a boy reaches his school 5 min early. Find his usual time to reach the school?