Loading...
UPSC 2000: A rectangular piece of iron sheet measuring 50 cm by 100 cm is rolled into a cylinder of height 50 cm. If the cost of painting the cylinder is Rs. 50 per square metre, then what will be the cost of painting the outer surface of the cylinder?
(a)Rs. 25.00
(b)Rs. 37.50
(c)Rs. 75.00
(d)Rs. 87.50
Attempt This Question
Not attemptedCorrect Answer: (a) Rs. 25.00
Rolling the 50 cm × 100 cm sheet with the 50 cm side as height gives height h = 50 cm and circumference 100 cm, so radius r = 100 ⁄ 2π = 50⁄π cm. Curved surface area = 2πrh = 100 × 50 = 5000 cm² = 0.5 m². Painting costs ₹50 per m², so cost = 0.5 × 50 = ₹25. ([edurev.in](https://edurev.in/t/203221/Geometry-Mensuration-Solved-Questions-1995-2020-?utm_source=openai))
Related UPSC Questions
More from Quantitative Aptitude
2000moderate
The monthly income of Komal and Asha are in the ratio of 4 : 3. Their monthly expenses are in the ratio of 3 : 2. However, both save Rs. 600 per month
2000moderate
In the given figure, all line segments of the shaded portion are of the same length and at right angles to each other. The same can be cut out of a bo
2000moderate
In the given figure, angle QOP = 30° and angle ORP = 20°, angle QOR is equal to
Related Science & Technology Topics
2000Energy & Environment
Consider the following features of newer models of motor cars: I. Radial tyres II. Streamlined body III. Multipoint fuel injection IV. Catalytic conve
2000Physics
When a CD (Compact Disc used in audio and video systems) is seen in sunlight, rainbow-like colours are seen. This can be explained on the basis of the
Frequently Asked Questions
What is the correct answer to this UPSC 2000 Science & Technology question?▼
The correct answer is option (a): Rs. 25.00. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Quantitative Aptitude question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2000, GS Paper 1, as Question 140. It falls under Science & Technology > Quantitative Aptitude.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Quantitative Aptitude?▼
UPSC has asked 178 questions from Quantitative Aptitude (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.