Walking 3/2 of his usual rate, a boy reaches his school 4 min early. Find his usual time to reach the school? Select
A) 12 B) 99 C) 27 D) 28 E) 20
Speed Ratio = 1:3/2 = 2:3   Time Ratio = 3:2   1 -------- 3   4 --------- ? 12 m.12nswer:12
<result>A</result>
Walking 3/2 of his usual rate, a boy reaches his school 4 min early. Find his usual time to reach the school?