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The dimensions of the room are 7 m × 6m × 5 m. The cost of white washing the walls of the room and the ceiling at the rate of Rs 10.50 per m2 is
  • a)
    Rs 1866
  • b)
    Rs 1860
  • c)
    Rs 1806
  • d)
    Rs 1800
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
The dimensions of the room are 7 m × 6m × 5 m. The cost of w...
CSA of room +area of base
so 2(l+b)*h+l*b
2(7+6)*5+7*6
2(13)*5+42.
26*5+42
130+42
172

cost =area * rate
cost =172*10.50
=1806 ANSWER...
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Community Answer
The dimensions of the room are 7 m × 6m × 5 m. The cost of w...
Curved surface area + area of base
2h(l+b) + L ×B
2 × 5(7+6) +7× 6
10(13) + 42
130 + 42
172
therefore cost of white washing the walls of room and cieling 172 m square = 172 ×10.5 =1806
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The dimensions of the room are 7 m × 6m × 5 m. The cost of white washing the walls of the room and the ceiling at the rate of Rs 10.50 per m2isa)Rs 1866b)Rs 1860c)Rs 1806d)Rs 1800Correct answer is option 'C'. Can you explain this answer?
Question Description
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