Rohan makes a cuboid of wood of sides 7 cm, 3 cm, 7 cm. How many such cuboids will he need to form a cube?
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Answer:
10 cm
Step-by-step explanation:
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Volume of cuboid = l*b*h
= 7*7*3 = 147
as we know that in LCM of cube there are 3 terms.
LCM of 147 = 3 * 7 * 7
To make it a perfect cube we have to multiply it by 3*3*7
= 147*7*3*3 = 9261
cube root of 9261 = 21
No. of such cuboids to make 9261 cm = 9261/21
= 63.
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