Math, asked by sanchit7157, 5 months ago

The walls and celling of a room are to be
plastered. The length breadth and height of the
room ae 45 m 3 m and 350 on respectively
Find the cost of plastering the room at the rate
of 12 per square metre​

Answers

Answered by nileshgupta121
2

Answer:

use 5 wall area

2(l+b)h+lb

2(45+3)×3.50+45×3

96×3.50+135

336+135

471 msq.

cost 471×12

rs 5652


nileshgupta121: you can ask if any proble. in maths
Answered by user12313
1
Given, length of the room (l) = 4.5 m

Breadth of the room (b) = 3m

Height of the room (h) = 350 cm = 3.5 m

And the cost of plastering = Rs. 8per m2

Therefore, the area of the walls = 2h(l+b)

= 2×3.5×(4.5+3) = 7×(7.5) = 52.2 m2


Area of the ceiling = lb = 4.5×3 = 13.5m
2

Area of the room = 52.5+13.5 = 66m
2

Hence, the cost of plastering = 66×8 = Rs 528
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