Question

A room is 12m by 10 m .find the cost of covering it's floor with bricks 20 cm by 6 cm if the cost of one thousand bricks is 220.​

Answer 1

Answer:

Lenght of the room= 12m

Breadth of the room= 10m

Area of the room = length × breadth

= 12m × 10m

= 120m²

Lenght of the brick= 20cm

Breadth of the brick= 6cm

Area of the brick= length × breadth

= 20cm × 6cm

= \frac{20}{100}m

100

20

m × \frac{6}{100}m

100

6

m

= 0.2m × 0.06m

= 0.012m²

Number of bricks= \frac{Area \:of\ the \:room}{Area \:of\: a\: brick}

Areaofabrick

Areaof theroom

= 120m²/0.012m²

= 10000

Cost of 1000 bricks= Rs 220

therefore,

Cost of 10000 bricks = 10 × 220

= Rs 2200