Question

(V) 704
Parikshit makes a cuboid of plasticine of sides 5 cm, 2cm, 5 cm. How many such
cuboids will he need to form a cube?
3 Cube Roots​

Answer 1

Class seven assignment

Answer 2

Answer:

20

Step-by-step explanation:

Given, side of cube is 5 cm, 2 cm and 5 cm.

∴ Volume of cube = 5×2×5 = 50

 

50 =   { 2×5×5  }               [    After doing prime factorisation     ]

Here, 2 , 5 and 5 cannot be grouped into triplets of equal factors.

∴ We will multiply 50 by (2×2×5) 20 to get perfect square. Hence, 20 cuboid is needed.

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