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A hollow iron pipe is 21 cm long with external diameter 8 cm. If iron weighs 8 gm/cm³ and weight of the pipe is 3.696 kg, then what is its internal radius?
Correct Answer: (b)
Official keyThis question appeared in the GPSC Prelims 2023 examination (GS). It is Question 195 out of 200 questions in this paper.
This question was part of the GPSC Prelims 2023 (GS). The GPSC Prelims examination tests candidates on general studies, current affairs, and aptitude through multiple-choice questions.
Practice previous year questions from all GPSC Prelims papers and compare patterns with UPSC Prelims PYQ to identify overlapping topics.