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A solid cubical block of fine wood costs Rs256 at Rs 500 per m2 . find its volume & the length of each side.

 ANS:  A solid cubical block of fine wood costs Rs256

cost: Rs 500 per m3       [volume measuredin m3]

required:its volume & the length of each side

Cost of 1000000cm3 of block = Rs500            [1m3 = 1000000cm3]

Volume of block in Rs256 = 1000000*256/500 = 512000cm3 

length of the block = 5120001/3 = 80cm 

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Thank you sanidhya. In which class you are?

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I am in class VIII

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 ok

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WrongYour answer is wrong
ANSwer=75
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I'm also looking for the solution
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There must be m^3 in order to calculate the solution on the basis of volume.
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Answer :

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multiplay
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Ques must be meter sq
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COST FOR ONE METER CUBE= 500 RS
ORGINAL COST=256 RS

VOLUME* COST FOR ONE METER CUBE=256
VOLUME=256/500=0.512 M³

VOLUME OF CUBE=A³(A IS THE SIDE)
A³=0.512
A=∛0.512=0.8
SIDE =0.8 m
so 
80 cm
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800 rs
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756 its volume of the length of each side
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?A polygon is a plane?shape with straight sides.
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