Question

a room is 10 metres long 5 metre broad and 12 metre height find the cost of whitewashing all four walls is the cost of whitewashing is rupees 7 per metre square what will be the cost of whitewashing the ceiling of the room is also whitewashed​

Answer 1

Answer:

the room is in the shape of a cuboid and it's four walls are its lateral surfaces

LSA of cuboid = 2×h ( l + b )

2×12 ( 10 +5 )

24 × 15

= 360 m2

cost 7× 360

2520

and the cost of whitewashing the celling

area = l×b

10×5=50

cost 50×7=350