25 deciliters of paint is required to paint a cardboard box on all sides. How much paint (in liters) will be required to paint all sides of another cardboard box whose sides are 20% more than the sides of the orginal carboard box.
Explanation:
Since the box is painted on all the sides, the amount of paint required will be directly proportional to the surface area of the box.
If sides increase by 20% (i.e., 1/5th), the surface area will become, 6/5 × 6/5 = 36/25 times.
∴ The amount of paint required will also become 36/25 times.
∴ The amount of paint required = 36/25 × 25 = 36 deciliters = 3.6 liters.
Hence, option (c).
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