Mathtips

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Solution for yesterday’s problem

Time ratio of John and Alice = 7:5; therefore their efficiency ratio=5:7

Let John type 5x pages and Alice type 7x pages in one hour

John types the mean value of 5x and 7x = 6x

By supposition, 5x+6x+7x = 216/4 = 54

=> x = 3; they type 15, 18, 21 pages respectively in one hour.

Today’s problem

If a man travels at 30 miles per hour, he reaches his destination late by 10 minutes but if he travels at 42 miles per hour then he reaches 10 minutes earlier. Find the distance (Asked by Preeti)

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