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 result:

b =  20 cm

Solution:

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

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