Question

Length of a rectangle exceeds its breadth by 4cm.if the perimeter of the rectangle is 84 .find the length and breadth of rectangle?

Answer 1

this is your answer in photo

Answer 2

let the length of rectangle is l and breadth = b

given , l = b + 4 ----------(1)

given perimeter 2( l + b ) = 84 cm

2 ( b + 4 + b ) = 84

2 ( 2b + 4 ) = 84

4b + 8 = 84

4b = 84 - 8

4b = 76

b = 19 cm

put value of " b" in (1), we get

l = 19 + 4 = 23 cm

hence the length and breadth of rectangle are

l = 23 cm , and b = 19 cm

【 hope it helps 】