Question

the length of a rectangle room is two times its breadth and the perimeter of its floor is 45m find the cost of carpeting its floor at 110 per sq.m.

Answer 1

Step-by-step explanation:

Let breadth is x then length is 2x

perimeter of rectangle =2 (l + b)

45 =2 (x+2x)

45=2× 3x

45=6x

x=45/6

×=7.5

length is 2x=2×7.5=15 m

breadth isx=7.5

Area of floor =l×b

=7.5×15

=112.5

cost of carpeting is 110 per square metre

cost of carpeting 112.5 m =112.5×110

; =12375

Answer 2

Answer:

825

Step-by-step explanation:

Given,

Perimeter of rectangle : 45 m

If length is two times of breath,

Length = 2x

Breath = x

Perimeter of rectangle =2(l+b)

                                 45 = 2(2x+x)

                                   45 = 4x + 2x

                                   45 = 6x

                                     7.5 sq = x

cost of carpeting 110 per sq m = 7.5 x 110