Medium
The length of side of a cube whose surface area is 150 cm² is -
Explanation
Explanation
The total surface area of a cube is given by the formula 6 × (side)². Substituting the given area: 6 × side² = 150, so side² = 150 ÷ 6 = 25. Taking the square root, side = √25 = 5 cm. So the correct answer is 5 cm, option (2).
PRO TIP
Re-check your working by substituting the answer back into the original question.