Question

4. Parikshit makes a cuboid of plasticine of sides 5 cm. 2 cm, 5 cm. How many such
cuboids will he need to form a cube?
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Answer 1

Answer:20 cuboid will be needed

Answer 2

Answer:

20 cuboids

Step-by-step explanation:

the sides of the cuboid are given as 5 cm , 2 cm and 5 cm

volume of the cuboid = 5 * 2 *5= 50 cm

for the prime factorization of 50 we have

50 = 2 * 5 * 5

to make it a perfect cube we must have

2 * 2 * 2 * 5 * 5 * 5

20 * ( 2 * 5 * 5 )

= 20 * volume of the cuboid

Thus the require number of cuboids = 20