The perimeter of rectangle is 1 meter. It's breadth is 20cm. What is it's length
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Step-by-step explanation:
perimeter = 1m = 100 cm
b = 20 cm
perimeter formula = 2(l+b)
= 2(l+20)= 100
2l+40 = 100
2l = 100 -40
2l = 60
l= 30
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