The volume of a cube is 63 cm3.What is its surface area?
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Volume = a^3 = 63cm^3
Then , a =![\sqrt[3]{63}](https://tex.z-dn.net/?f=+%5Csqrt%5B3%5D%7B63%7D+ "\sqrt[3]{63}")
= 3.9 cm
Total Surface area of a cube = 6a^2 = 6 × 3.9^2 = 91.26 cm^2
Lateral Surface area = 4a^2 = 4 × 3.9^2 = 60.84 cm^2
A simple assumption theory to find cube root easily !!
》》 First find the nearest perfect cube , as here is 63 , the nearest perfect cube is 64 and its cube root is 4 , so we can assume that cube root of 63 is less than 4 and very close to 4, and so we can take it 3.9 which is very close to 4
Then , a =
Total Surface area of a cube = 6a^2 = 6 × 3.9^2 = 91.26 cm^2
Lateral Surface area = 4a^2 = 4 × 3.9^2 = 60.84 cm^2
A simple assumption theory to find cube root easily !!
》》 First find the nearest perfect cube , as here is 63 , the nearest perfect cube is 64 and its cube root is 4 , so we can assume that cube root of 63 is less than 4 and very close to 4, and so we can take it 3.9 which is very close to 4
BrainlyHulk:
:-)
Thank u so much mam
hey
I am sorry , I first gave you wrong answer
now I corrected
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