Second side

Calculate the length of the other side of the rectangle if its circumference is 60 cm, and one side is 10 cm long.

Correct answer:

b =  20 cm

Step-by-step explanation:

o=60 cm a=10 cm  2(a+b)=o 2(10+b)=60  2 (10+b)=60  2b=40  b=240=20  b=20=20 cm

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