The internal measures of a cuboidal room are 10m*8m*4m. Find the total cost of whitewashing four walls of a room, if the cost of whitewashing is rupees 5 per metre square .
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Answer:
Step-by-step explanation:
See basically we have to find the curved surface area of the room and then multiply the area by the cost given
Therefore,
C.s.a of cuboid = 2h(l+b)
= 2 ×4(10+8)
= 8(18)
= 144 m square
Therefore, cost of painting
= 144×5
=720 RS
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