What is the area of a square (in cm2) in which the sides are double that of a square with area 30 cm2?
Explanation:
∵ We know area of a square ∝ (side)2.
Hence, if side is double, the area will become quadruple.
⇒ The new area will be 4 × 30 = 120 cm2.
Hence, option (b).
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