Question

The measure meants of a cuboidal room are 12m×8m×4m. Find the total cost of white washing all the four walls of the room. If the cost is rs. 5 per m2, wt will be the cost of white washing if the ceiling of the room is also white washed

Answer 1

Answer:

Step-by-step explanation:

Length of room = 12m

Breadth of room= 8m

Height of room= 4m

C.S.A of room= 2(hl+hb)

= 2[(4)(12)+(4)(8)]

= 2(48)+(32)

=2(80) = 160m square

Cost of four walls of room = 160×5

= 800rs

Ceiling of room = l×b = 12×8 = 108m square

Cost of ceiling room = 108×5 = 540rs

Total cost = 800+540 = 1340 rs

Answer 2

area of hall=2(lb+bh+lh)

area of hall=2(10*9+9*8+10*8)

area of hall=2(90+72+80)

area of hall=2(242)

area of hall=484sqm

cost=area×cost per sqm

cost=484×8.50

cost=4114 Rs

cost of white washing the wall and ceiling will be 4114 Rs

now solve by your dimensions