Question

the perimeter of a rectangle is 240 CM if its length is decreased by 10% and its breadth is increased by 20% we get same perimeter find the length and breadth of the rectangle

Answer 1

Answer:

80 and 40 m

Step-by-step explanation:

2*(L+B )= 240

L+B = 120

L(1-10/100) + B(1+20/100)=120

0.9L + 1.2 B = 120

0.75L + B = 100

L +B - 0.75L -B = 120-100

0.25L = 20

L = 80

80+ B = 120

B = 40