The perimeter of a rectangle is 60 cm and its length is 20 cm. What is the breadth of the rectangle?a) 10 cmb) 15 cmc) 20 cmd) 25 cm
Question
The perimeter of a rectangle is 60 cm and its length is 20 cm. What is the breadth of the rectangle?
a) 10 cm
b) 15 cm
c) 20 cm
d) 25 cm
Solution
The formula for the perimeter of a rectangle is 2*(length + breadth).
Given that the perimeter is 60 cm and the length is 20 cm, we can substitute these values into the formula:
60 = 2*(20 + breadth)
Solving for breadth, we get:
60 = 40 + 2*breadth
Subtract 40 from both sides:
20 = 2*breadth
Finally, divide both sides by 2 to solve for breadth:
breadth = 20/2 = 10 cm
So, the correct answer is a) 10 cm.
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