Asked by Tacit
Alex can read 8 pages in 20 minutes. How long will it take him to read 20 pages?
Answers
Answered by
Bosnian
20 / 8 = 4 * 5 / ( 4 * 2 ) = 5 / 2 = 2.5 min / page
2.5 * 20 = 50 min
OR
8 / 20 = 20 / x Multiply both sides by x
8 * x / 20 = 20 * x / x
8 x / 20 = 20 Multiply both sides by 20
8 x * 20 / 20 = 20 * 20
8 x = 400 Divide both sides by 8
8 x / 8 = 400 / 8
x = 50 min
2.5 * 20 = 50 min
OR
8 / 20 = 20 / x Multiply both sides by x
8 * x / 20 = 20 * x / x
8 x / 20 = 20 Multiply both sides by 20
8 x * 20 / 20 = 20 * 20
8 x = 400 Divide both sides by 8
8 x / 8 = 400 / 8
x = 50 min
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