12. Find the area of the four walls of a room 10 m long, 8 m wide and

1.	12. Find the area of the four walls of a room 10 m long, 8 m wide and 4 m high. If the room has2 doors 2 mx 1.6 m and four windows each of size 1 mx 1.6 m, find the cost of white washing thewalls at ₹12 per sq. metre. Also, find the cost of plastering its ceiling at ₹16per sq.metre
Answer» Step-by-step explanation: AREA of four walls=2(l+b)H =2(10+8)4 =2(18)4 =36×4 =144 M² area of DOORS and windows=2(2×6)+4(1 ×6) =24+24 =48 M² cost of PAINTING of four walls=144 (12) =144×12 =11728Rs.

12. Find the area of the four walls of a room 10 m long, 8 m wide and 4 m high. If the room has2 doors 2 mx 1.6 m and four windows each of size 1 mx 1.6 m, find the cost of white washing thewalls at ₹12 per sq. metre. Also, find the cost of plastering its ceiling at ₹16per sq.metre

Answer»

Step-by-step explanation:

AREA of four walls=2(l+b)H

=2(10+8)4

=2(18)4

=36×4

=144 M²

area of DOORS and windows=2(2×6)+4(1 ×6)

=24+24

=48 M²

cost of PAINTING of four walls=144 (12)

=144×12

=11728Rs.

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12. Find the area of the four walls of a room 10 m long, 8 m wide and 4 m high. If the room has2 doors 2 mx 1.6 m and four windows each of size 1 mx 1.6 m, find the cost of white washing thewalls at ₹12 per sq. metre. Also, find the cost of plastering its ceiling at ₹16per sq.metre​

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12. Find the area of the four walls of a room 10 m long, 8 m wide and 4 m high. If the room has2 doors 2 mx 1.6 m and four windows each of size 1 mx 1.6 m, find the cost of white washing thewalls at ₹12 per sq. metre. Also, find the cost of plastering its ceiling at ₹16per sq.metre