Math, asked by kiara780, 8 months ago

The internal length, breadth and height of a rectangular room are 6 cm, 5.2 m and 4.5 m

respectively. It has two doors each of 1.2 m by 2 m and three windows each of 1 m by 80 cm. Find

the total internal area of the room to be whitewashed. Also, find the cost of whitewashing the room

(excluding the doors and windows) at the rate of Rs. 6 per m².​

Answers

Answered by snehasishto1996
3

Answer:

Total area to be Whitewashing = 124.6 m^2

Total cost= Rs. 747.6

Step-by-step explanation:

Perimeter of the floor = 2*(6+5.2) m

=2* 11.2 m

= 22.4 m

Area of four walls = 22.4*4.5 m^2

= 100.8 m^2

Area of roof = 6*5.2 m^2 = 31 m^2

Tota area of two doors and three windows

= 2* 1.2*2 + 3*1*0.8 m^2

= 4.8 + 2.4 m^2

= 7.2 m^2

Total internal area of the room to be Whitewashing

=( 100.8+31-7.2 ) = 124.6 m^2

Total cost =Rs. (124.6 * 6) = Rs. 747.6

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