Question

a room is 3 times longer than its breadth and its perimeter is 32 m .find the cost of careting its floor with carpet 80 cm wide at rs 12 per meter​

Answer 1

Step-by-step explanation:

let breadth = x,

and length = 3x...(given)

→ perimeter = (2× length) + (2× breadth)

→ perimeter = (2× x) + (2× 3x)

→ perimeter = (2x + 6x)

→ perimeter = 8x = 32

→ 8x = 32

→ x = 32/8

→ x = 4

length of the room = 3x

= 12m

breadth of the room = x

= 4m

area of the room = 12m × 4m

= 48m×m

area of carpet = 100cm × 80cm

= 8000cm ×cm

no. of carpet = 480000/8000

= 60

cost of carpet = 60 × 12

= 720 rupees