Question

7. The perimeter of a rectangle is 80 cm. If the length of the rectangle is thrice the breadth, find the length
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Answer 1

Answer:

Let breadth be x cm and length be 3x cm.

Given perimeter= 80cm

=> 2×(length+breadth)= 80cm

=> 2×(3x+x)= 80

=> 2×4x = 80

=> 8x= 80

=> x= 10

Therefore, length = 3x

=3×10

= 30cm

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