Question

Mark for review four walls of a room measure 10 m by 8 m each. If 1 sq m of paint cost Rs. 22, what is the total cost of painting all the walls?

Answer 1

Answer:

Rs. 7040

Step-by-step explanation:

Total Area to be painted = (10*8)*4

                                         =    320 sq m

cost of painting 1 sq m = Rs 22

Total cost = 320*22

                 = Rs 7040

Answer 2

Answer:

Area of rectangle =length ×breadth

area of 4 walls= 4( area of one wall)

=4(10×8) = 4×80

=320 metre square

Total Cost of painting one = Total area to be covered (i.e. area of four walls)× rate of painting one 1 sq.m

=320 ×22

=₹7040

Step-by-step explanation:

First of all we need to find the area covered by one wall then we have to multiple it by 4 . So, that we will get the total area.

Then multiple the cost of painting 1 sq.m by The total area to be covered.