Question

The perimeter of a square room is 40 m.
() Find its length.
(ii) Find the area of its floor.
(ii) Find the cost of carpeting the floor at Rs 70 per sq. metre.
please help me to solve it​

Answer 1

Step-by-step explanation:

Given

The perimeter of a square room is 40 m.

so

let length = x

then breadth = x ( because in square all side are equal )

(i) Perimeter = 40 m

2(x+x) = 40

2x+2x = 40

4x = 40

x =10 cm

(ii) area of its floor

area = side²

= 10²

= 100 cm^2

(iii) the cost of carpeting the floor at Rs 70 per sq. metre.

= 100×70

= ₹ 7000

Answer 2

Answer:

given:

perimeter of square room = 40m

to find:

a) length = 40/4

= 10 m

b) find the area of its floor

area = 10²

= 100 m²

c) find the cost of carpeting the floor at rs 70 m²

cost = 100×70

= rs 7000