MCQEasy1 mark
1
Choose the correct answers to the questions from the given options. (Do not copy the questions, write the correct answers only.)
Question 1(xiv): A rectangular sheet of paper of size 11 cm × 7 cm is first rotated about the side 11 cm and then about the side 7 cm to form a cylinder, as shown in the diagram. The ratio of their curved surface areas is:
Topic: Mensuration
Previous-year question practice database
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Pick an option and check your answer. The full worked answer is below either way.
Answer
Exam answer
(a) 1 : 1
Explanation
For rotation about 11 cm, cylinder r=7,h=11; about 7 cm, r=11,h=7. Curved surface areas 2πrh are equal.
In words
1 : 1
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