Question

The length of rectangular room is two times it's breadth and the perimeter office floor is 45 metre find the cost of carpeting its floor at Rs 110 per square metres.​

Answer 1

Answer:

Let the breadth of the rectangle be x

length of the rectangle=2x

we know that,

2×(l+b)= Perimeter

2×(2x+x)= 45

2×3x=45

6x=45

x= 7.5

Breadth= 7.5m

Length= 15m

Area=l×b

7.5×15m²

112.5 m²

cost rs 110

cost =112.5×110m²=12,375