APPSC Group-I Prelims 2019 Paper II · Question 24

Question 24 of the APPSC Group-I Prelims 2019 Paper II (26 May 2019). Try it first, then open the answer and explanation.

1. Prelims 2019 · P-II · Q24 · Mental Ability & Reasoning · Arithmetic

   External dimensions of a wooden cuboid are 30 cm × 25 cm × 20 cm. If the thickness of the wood is 2 cm all around, find the volume of the wood contained in the cuboid formed.

   ఒక చెక్క క్యూబాయిడ్ బయిటకొలతలు 30 సె.మీ × 25 సె.మీ × 20 సె.మీ. చెక్క మందం 2 సె.మీ. చుట్టూ ఆ చెక్క క్యూబాయిడ్ మొత్తం వాల్యూం ఎంత?

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   Answer: 6264 cm³

   సమాధానం: 6264 cm³

   External volume = 30 × 25 × 20 = 15000 cm³. Internal dimensions are 26 × 21 × 16, giving 8736 cm³. Wood = 15000 − 8736 = 6264 cm³.

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