Multiple choice

The length and height of a cuboidal box are 10 cm and 15 cm respectively. If its lateral surface area is 1200 cm2, its breadth is equal to _____.

  1. 18 cm

  2. 45 cm

  3. 10 cm

  4. 30 cm
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D Correct answer
Explanation

Lateral surface area = 2h(l + b) = 1200. 2 * 15 * (10 + b) = 1200. 30 * (10 + b) = 1200. 10 + b = 40. b = 30.

AI explanation

The lateral surface area of a cuboid is calculated as 2(l + b)h. Setting the given values into the formula yields 2(10 + b)15 = 1200. Solving 30(10 + b) = 1200 results in 10 + b = 40, making the breadth 30 cm.

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