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LMNOP is a semi-circle with centre at R and diameter LP; LSR and RQP are also semi-circles with centres at T and U and diameters LR = RP = 1⁄2 LP. The
A man purchases two clocks A and B at a total cost of Rs 650. He sells A with 20% profit and B at a loss of 25% and gets the same selling price for bo
The number of students in two sections, A and B, having different heights is shown in the following table: Height (in metres) Number of students wit
Examine the following three statements: I. Processed meat is a perishable food. II. All perishable foods are packed in sealed tins. III. Sealed tin
Which of the following statements are true about the Indian-born woman astronaut Kalpana Chawla? I. She was born in Karnal. II. She flew on board th
The correct answer is option (d): 60 years. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
This question was asked in UPSC CSE Prelims 1998, GS Paper 1, as Question 142. It falls under Science & Technology > Quantitative Aptitude.
This question is rated "moderate". It requires sound conceptual understanding of the topic.
UPSC has asked 164 questions from Quantitative Aptitude (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.