Solve and choose the correct answer. The cost of whitewashing the four walls of a room of dimensions length = 7m , breadth = 6m and height = 5m at the rate of Rs 100 /m2 is: O . Rs. 13000
Rs. 15400
Rs. 21000

search-icon-header

Search for questions & chapters

search-icon-image

Class 9

>>Maths

>>Surface Areas and Volumes

>>Surface Area of Cubes and Cuboids

>>The length, breadth and height of a room

Question

Bookmark

The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Find the cost white washing the walls of the room and ceiling at the rate of Rs. 7.50 per m

2

.

Medium

Solution

verified

Verified by Toppr

Given:

L=5 m, B=4 m, H=3m

⇒Area to be white-washed = Area of cuboid − Area of base.

=2lh+2bh+2lb−lb

=2lh+2bh+lb

=[2×5×3+2×4×3+5×4]m

2

=74m

2

Cost of white washing per m

2

area = Rs.7.50

Cost of white washing 74m

2

area=74×7.50

= Rs.555

step-by-step explanation:

how many centimeters did the level of the salsa go down by?