English, asked by Anonymous, 4 months ago

A room is 20m long, 15m wide and 12m high. It contains a door 7.5m × 4m and two windows of size 4m × 2.5m. Find the cost of painting its wall @ rs. 15 per m2​

Answers

Answered by Anonymous
1

Explanation:

length of room=20m

breadth of room=15m

height of room =12m

C.S.A = 2 ( l + b)h

= 2 (20m+15m)12m

=2 ×35m×12m

=70m ×12m

=840m^2

length of door=7.5m

breadth of door=4m

area of door=length×breadth

=7.5m×4m

=30m^2

length of window =4m

breadth of window =2.5m

area of window = length × breadth

= 4m×2.5m

=10.0m^2

area of 2 Windows = 2× 10.0m^2

=20.0m^2

area of wall= area of room - (area of door +area of window)

=840m^2-(30m^2+20m^2)

=840m^2- 50m^2

=790m^2

cost of painting a m2 = Rs.15

cost of painting 790m2=790×Rs. 15

= Rs.11850

Answered by IIXXINNOCENTBOYXXII
10

Explanation:

Explanation:

length of room=20m

breadth of room=15m

height of room =12m

C.S.A = 2 ( l + b)h

= 2 (20m+15m)12m

=2 ×35m×12m

=70m ×12m

=840m^2

length of door=7.5m

breadth of door=4m

area of door=length×breadth

=7.5m×4m

=30m^2

length of window =4m

breadth of window =2.5m

area of window = length × breadth

= 4m×2.5m

=10.0m^2

area of 2 Windows = 2× 10.0m^2

=20.0m^2

area of wall= area of room - (area of door +area of window)

=840m^2-(30m^2+20m^2)

=840m^2- 50m^2

=790m^2

cost of painting a m2 = Rs.15

cost of painting 790m2=790×Rs. 15

= Rs.11850

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