a rectangular room is twice as long as its breadth and its peimeter is 540 m. find the number of bricks of size 20 cm * 12cm to pave the room. if the rate of cost of bricka is rs. 950 per 1000, find the cost of paving the room.

Question

Mathematics

Jaylin Kirk

11 December, 02:30

a rectangular room is twice as long as its breadth and its peimeter is 540 m. find the number of bricks of size 20 cm * 12cm to pave the room. if the rate of cost of bricka is rs. 950 per 1000, find the cost of paving the room.

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Answers (1)

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Thomas Castaneda · Answer 1

Step-by-step explanation:

breadth = x

length = 2x

Perimeter = 540m

2 * (length + breadth) = 540

2 * (2x + x) = 540

3x = 540/2

3x = 270

x = 270/3

x = 90 m

Breadth = 90m = 90 * 100 = 9000 cm

Length = 2*90 = 180 m = 180 * 100 = 18000 cm

No. of bricks = Area of room / area of one brick

= 9000 * 18000 / 20 * 12

= 675000 bricks