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
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
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
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
Similar questions