Question

The measures of a cuboidal room are 12 m × 8 m × 4 m. Find the total cost of

whitewashing all four walls of a room, if the cost of whitewashing is `5 per m².​

Answer 1

Answer:

Step-by-step explanation:

The dimensions of room is 12×8×4

The Lateral surface area is  

2h(l+b)

2(4)(12+8)

8×20=160m  

 

Cost of white wash is 5m  

 

Total cost is 5×160=800Rs,

Answer 2

Step-by-step explanation:

The Total surface is 2(lb+bh+hl)

This is for all walls but here only four walls are required to be painted so Lateral Surface are=2h(l+b)

=2(4)(12+8)

=8(20)

=160