Surface Areas and Volumes
1 Board Maths previous year questions on Surface Areas and Volumes — options free on every question; 1 include the answer & explanation free, the rest unlock with PYQ Pass.
Q1 FREE PREVIEW
The total surface area of a cube is 486 \(c{m}^{2}\). Measure of the side of the cube will be:
✓ Correct answer: d)
9 cm
Explanation
Formula for total surface area of a cube:
\(\text{TSA}=6{a}^{2}\)
Where \(a\) is the side of the cube.
Given: \(\text{TSA}=486{\text{ cm}}^{2}\)
\(6{a}^{2}=486\)
\({a}^{2}=\frac{486}{6}=81\)
\(a=\sqrt{81}\\ =9\text{ }\text{cm}\)
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