(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
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Class seven assignment
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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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