Case Study Questions Class 9 Maths Chapter 13 are very important to solve for your exam. Class 9 Maths Chapter 13 Case Study Questions have been prepared for the latest exam pattern. You can check your knowledge by solving case study-based questions for Class 9 Maths Chapter 13 Surface Areas and Volumes
Case Study Questions Class 9 Maths Chapter 13
Case Study/Passage-Based Questions
Case Study 1: A class teacher brings some clay into the classroom to teach the topic of mensuration. First, she forms a cylinder of radius 6 cm and height 8 cm and then she molds that cylinder into a sphere.
Find the volume of the cylindrical shape.
(a) 288 π cm3 (b) 244 π cm3
(c) 240 π cm3 (d) 216 π cm3
Answer: (a) 288 π cm3
When clay changes into one shape to other, which of the following remains same?
(a) Area (b) C.S.A (c) Radius (d) Volume
Answer: (d) Volume
The radius of the sphere is
(a) 2 cm (b) 4 cm (c) 5 cm (d) 6 cm
Answer: (d) 6 cm
Find the volume of sphere, the teacher made.
(a) 288π cm3 (b) 184π cm3
(c) 240π cm3 (d) 216π cm3
Case Study/Passage-Based Questions
Case Study 2: Ankita realized the need for food for birds on her terrace and decided to make a bird feeder. She got a flexible plastic rectangular sheet of size 44 cm × 15 cm. She rolled it along its length and joined the two opposite ends using a tape for the circular base of the cylinder. She found a square sheet of size 15 cm × 15 cm by cutting it into the required circular shape she prepared the bird feeder as shown in the figure.
The curved surface area of the cylinder formed is
(a) 550 cm2 (b) 660 cm2
(c) 430 cm2 (d) 840 cm2
Answer: (b) 660 cm2
The radius of the base of the cylinder is
(a) 5 cm (b) 6 cm (c) 7 cm (d) 8 cm
Answer: (c) 7 cm
The area of the circular base required for the cylinder is
(a) 154 cm2 (b) 164 cm2
(c) 240 cm2 (d) 184 cm2
Answer: (a) 154 cm2
How much will be the area of square sheet left unused after removing the circular base of the cylinder from it?
(a) 78 cm2 (b) 62 cm2
(c) 75 cm2 (d) 71 cm2
Answer: (d) 71 cm2
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