Question

12. Find the cost of polishing the floor of a square hall at the rate of 15 per metre sq, if each side of the hall is 12.5 m.​

Answer 1

$\bold{\underline{\underline{Answer:}}}$

Cost of polishing the floor of the square hall is ₹ 2343.75

$\bold{\underline{\underline{Step\:-\:by\:-\:step\:explanation:}}}$

Given :

• Side of Square Hall = 12.5 m
• Cost of polishing the floor per metre sq. = ₹ 15

To find :

• Cost of polishing the floor

Solution :

First we will calculate the area of floor of the square hall.

We can calculate using the formula :

$\bold{Area\:of\:square\:=\:(side)^2}$

Plug in the values,

$\bold{Area\:of\:square\:=\:(12.5)^2}$

$\bold{Area\:of\:square\:=\:12.5\times\:12.5}$

$\bold{Area\:of\:square\:=\:156.25}$

•°• Area of the floor of Square Hall is 156.25 m²

Per square meter cost of polishing

the floor is ₹ 15,

•°• To find the cost of polishing the floor of the square hall of area 156.25 sq.m, simply multiply 15 by the area of the floor of the square hall.

•°• Cost of polishing,

$\implies$ $\bold{15\times\:156.25}$

$\implies$ $\bold{2343.75}$

•°• Cost of polishing = ₹ 2343.75

Answer 2

ANSWER:-

Given:

•The floor of a square hall at the rate of Rs.15m².

•The side of each side of the hall is 12.5m.

To find:

The cost of polishing the floor.

Solution:

Square: A square is a shape with four sides that are all the same length & four right angles.

Formula of the square:

•Perimeter of square= 4× side

•Area of the square= side × side [a]²

According to the question:

Each side of the hall is 12.5m.

=) Area=s²

=) Area =(12.5m)²

=) Area = 12.5m × 12.5m

=) Area = 156.25m²

Now,

•Cost of polishing & rate is Rs.15m²

=) Rs.(156.25m² × 15)

=) Rs.2343.75

Thus,

The cost of the polishing the floor is

Rs.2343.75.

Thank you.