Question

A wire of length 21 cm is bent in a form of rectangle in such way that its length becomes 1•5 cm less than twice its breadth find the length and breadth of rectangle

Answer 1

Answer:

length = 6.5 cm

breadth = 4 cm

Step-by-step explanation:

bent wire becomes the perimeter of the rectangle = 2(l + b) = 21

let the breadth be x

length = 2x - 1.5

perimeter = 2 ( 2x - 1.5 + x) = 21

2 ( 3x - 1.5) = 21

6x - 3 = 21

6x = 21 + 3

6x = 24

x = 24/6 = 4

breadth = 4 cm

length = 2x - 1.5

= 2×4 - 1.5 = 8 - 1.5 = 6.5 cm