Question

a marble tile measure 10cm by 12cm. how many tiles will be required to cover a wall of size 3m by 4m? also find the total cost of the tiles rate of rs2 per tile​

Answer 1

Refer to the attatchment above.

Answer 2

A marble tile measure 10cm by 12cm.

• Length of marble = 10 cm
• Breath of marble = 12 cm

Area of tile = Area of rectangle

Area of a tile = length × breadth

⇒ 10 × 12

⇒ 120 cm²

Also, a wall of size 3m by 4.

• Length of wall = 3 m
• Breadth of wall = 4 m

Area of wall = length × breadth

⇒ 3 × 4

⇒ 12 m²

To convert m into cm. Multiply with 100. And m² into cm². Multiple with 10000.

⇒ 12 × 10000

⇒ 120000 cm²

Now,

$\sf{Number\:of\:tiles\:=\:\frac{Area\:of\:a\:wall}{Area\:of\:a\:tile}}$

Substitute the known values in above formula

⇒ $\sf{\dfrac{120000}{12}}$

⇒ $\sf{10000}$

Cost of 1 tile is Rs. 2

Cost of 10000 tiles = Rs. 2 × 10000

⇒ Rs. 20000