*According to the CBSE Syllabus 2023-24, this chapter has been renumbered as Chapter 13.
NCERT Solutions for Class 7 Maths Exercise 15.4 Chapter 15 Visualising Solid Shapes is an essential study resource as it offers a wide range of questions that test students’ understanding of concepts. This exercise of NCERT Solutions for Class 7 Maths Chapter 15 contains the topic related to ‘another way is by shadow play’. The expert faculty at BYJU’S solved the problems step-by-step with neat explanations to help students comprehend easily.
NCERT Solutions for Class 7 Maths Chapter 15 Visualising Solid Shapes – Exercise 15.4
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Access Answers to NCERT Solutions Class 7 Maths Chapter 15 – Visualising Solid Shapes Exercise 15.4
1. A bulb is kept burning just right above the following solids. Name the shape of the shadows obtained in each case. Attempt to give a rough sketch of the shadow (You may try to experiment first and then answer these questions).
(i)
Solution:
The shape of the shadow obtained from the ball is a circle.
(ii)
Solution:
The shape of the shadow obtained from the cylindrical pipe is a rectangle.
(iii)
Solution:
The shape of the shadow obtained from the book is a rectangle.
2. Here are the shadows of some 3-D objects, when seen under the lamp of an overhead projector. Identify the solid(s) that match each shadow. (There may be multiple answers for these!)
(i)
Solution:
Cricket ball, water bottle cap, Disc
(ii)
Solution:
Die, chalk box etc.
(iii)
Solution:
Birthday cap, pizza slice etc.
(iv)
Solution:
Book, keyboard, mobile etc.
3. Examine if the following are true statements:
(i) The cube can cast a shadow in the shape of a rectangle.
Solution:
The above statement is true.
(ii) The cube can cast a shadow in the shape of a hexagon.
Solution:
The above statement is false.
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NCERT Solutions for Class 7 Maths
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