Swimming pool 7

The perimeter of a rectangular swimming pool is 20 4/5 meters. Its length is thrice its width. What is the length of the pool? What is its width?

Correct answer:

a =  7 45 = 39/5 m
b =  2 35 = 13/5 m

Step-by-step explanation:

p=2054=20+54=520 5+4=5100+4=5104=20.8 m  a=3b  p = a+b+a+b = 2a+2b=2(a+b)  p=2a+2/3 a 20.8=2a+2/3 a  20.8=2 a+2/3 a  8a=62.4  a=862.4=7.8  a=539=7.8=539 m=754 m=7.8 m
b=a/3=7.8/3=513=2.6=513 m=2.6 m   Verifying Solution:  p2=2 (a+b)=2 (7.8+2.6)=5104=20.8 m

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