The perimeter fo a cube is 20 cm. IFind the total surface area.
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As we know that,
No. of edges in a cube = 12
So,
Perimeter = 12a
20 = 12a
a = 20/12 = 5/3 cm
Now,
T.S.A. = 6a² = 6*(5/3)² = 6*25/9
= 50/3 = 16.66 cm²
Hope this helps you!
No. of edges in a cube = 12
So,
Perimeter = 12a
20 = 12a
a = 20/12 = 5/3 cm
Now,
T.S.A. = 6a² = 6*(5/3)² = 6*25/9
= 50/3 = 16.66 cm²
Hope this helps you!
sohailkadir:
thanks
but the answer is not correct
please tell me the answer so that I can correct my mistake
the answer is 150 cm²
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