Question

if a total surface area of a cubical tank is 486 sq.m what is the lenght of its side

Answer 1

t.s.a of cubical tank=486
6a^2=486
a^2=486
-----
6
a^2=81
a=+-9
a=9 cm

Answer 2

The length of side of cubical tank is 9 m

Step-by-step explanation:

Let the side of cubical tank be x

Total surface area of cubical tank = $6a^2$

Where a is the side of tank

So,  Total surface area of cubical tank = $6x^2$

we are given that total surface area of cubical tank is 486 sq.m

So,$6x^2 = 486\\x^2 = \frac{486}{6}\\x=\sqrt{\frac{486}{6}}$

x=9 m

Hence The length of side of cubical tank is 9 m

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