Question

What will it cost to paint the circular roof of a building of radius 4.2 m at the rate of rs 25 per square metre

Answer 1

Answer:

Rs 1386

Step-by-step explanation:

Area = πr^2

= 22/7×4.2×4.2

= 13.2×4.2

=55.44 m2

Cost = 25×55.44

= RS 1386

Answer 2

The cost to paint the circular roof of a building is Rs.1386.

Step-by-step explanation:

To find : What will it cost to paint the circular roof of a building of radius 4.2 m at the rate of Rs.25 per square metre ?

Solution :

The radius of circular roof is r=4.2 m.

The area of the circular roof is $A=\pi r^2$

$A=\frac{22}{7}\times 4.2^2$

$A=55.44\ m^2$

The rate of Rs.25 per square metre.

The cost of paint required is

$C=55.44\times 25$

$C=Rs.1386$

Therefore, the cost to paint the circular roof of a building is Rs.1386.

#Learn more

A rectangular room is of the length 10 m and breadth 6 m and height 3 M .the four walls and the roof the have to be painted if the cost of painted is rupees 75 per square metre what will be the total cost? The area of the window and door is 6 square metre which are not to be painted

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