Arectangular pool has a length that is 4 less than 3 times the width. if the perimeter is 64m what is the area of the pool?

207 m²

Step-by-step explanation:

width = x

length = 3x - 4

2(length + width ) = Perimeter

2(3x - 4 + x) = 64

4x - 4 = 64/2

4x - 4 = 32

4x = 32 + 4

4x = 36

x = 9  m  -  width

length = 3x - 4 = 3 · 9 - 4 = 23 m

Area = length · width = 23 · 9 = 207 m²

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls

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