Q.20 Find the smallest number by which 53240 should be multiplied to get a perfect cube,the cube root of the product.
Q.21 How many cuboids of sides 3cm, 5cm and 8cm should be joined to make a perfect cube?
Q.22 Find the side of the cube whose volume is 17576cm3
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Q. 20 By prime factorisation the 53240 should be multiplied by 25 and the cube root of 53240 is 110
Q. 21 volume= (side) ^3
assume we need x cuboids
volume of cuboid =5x2x8=80
volume of x cuboids= 80xX
ans: 80x
Q21.A=V^⅓
=17576^⅓
≈26cm
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