Question

The dimensions of a prayer hall are 20m× 15m×8m. Find the cost of painting walls at Rs 10 per m2

Answer 1

Answer:

Given: dimensions=20m×15m×8m

=> l=20m, b=15m, h=8m

To find: cost of painting walls

solution: LSA of cuboid=2h(l+b)

2×8(20+15)

16×35

560m^2

cost of painting the walls= Rs 10×560m

Rs 5600

Answer 2

Answer:8600rs

Step-by-step explanation:

For painting the walls of players halls there must be one side is not painted of cuboid which is base so,

ATQ, l=20m,b=15m,h=8m

:Area of painted room=lsa of cuboid+upper side(l*b)

Then,

Area =2(l+b)h+lb

Area =2(20+15)8+20*15

,=560+300

,,,,,,=860m2

Cost of painting=860*10=8600₹