Question

The Length breadth and height of a room are 5 metre 4 metre and 3 respectively find the cost of whitewashing the inner of the room and selling at the rate of 50 rupees per square metre

Answer 1

Answer: Length breadth and height a room are 5 m 4 m and 3 m So volume is Length×breadth×height

=5×4×3= 60 cm.

Whitewashing the inner of the room and selling at the rate of rs.50.

So, 60×50 rs.300

Answer 2

Step-by-step explanation:

Length (l) of room = 5m

Breadth (b) of room = 4m

Height (h) of room = 3m

It can be observed that four walls and the ceiling of the room are to be white washed.

Total area to be white washed = Area of walls + Area of ceiling of room

= 2lh+2bh+lb

= [2×5×3+2×4×3+5×4]

= (30+24+20)

= 74

Area = 74 m2

Also,

Cost of white wash per m2 area = Rs.7.50 (Given)

Cost of white washing 74 m2 area = Rs. (74×7.50)

= Rs. 555