Question

anyone can do this????? 6th sum.

Answer 1

aloha!

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7th question:

we know that both the wall and the bricks are cuboids and the volume of cuboid is lbh 

now, for the wall the volume would be 1000 × 400 × 24 cm²

and the volume of one brick is = 24 × 12 × 8 cm²       
  { note: 1.5 is written by mistake over there }

now,

n × 24 × 12 × 8 = 1000 × 400 × 24 { n = number of bricks }

n = 
[tex] \frac{1000 X 400 X 24 }{24 X 12 X 8} [/tex]


n= 4166 bricks { approx. }

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hope it helps :)


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6th question:


we are given the circumference = 17.6
                                           2 $\pi$ r = 17.6
                                            r = 2.8 m
                                            r = 280 cm


and the curved surface area of dome= 2 $\pi$ r²
                                                                = 2 × 22/7 × 280 × 280 
                                                                = 492800 cm²



cost of painting 100 cm² = rs 5
1 cm² = 5/100 
492800 cm² = 5/100 × 492800
                      = rs 24640



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hope it helps :)