Question

26. An equilateral triangle of side 5 cm is cut out from any one of the edges of a rectangular piece of of paper of size 25 cm x 50 cm. The perimeter of the remaining part of the paper is​

Answer 1

perimeter of rectangle = 2(l + b)

= 2 (50 ×25)

= 150cm

perimeter of triangle = side ×3

= 5×3

= 15

perimeter of the cut of rectangle = 150 - 15 = 135cm

hence the cut off rectangular piece of paper's perimeter is 135cm

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