NCERT Solutions for Class 7 Maths Chapter 13 Visualising Solid Shapes Ex 13.4 (Rationalised Contents)
NCERT
Solutions for Class 7 Maths Chapter 13 Visualising Solid Shapes Ex 13.4 are the part of NCERT
Solutions for Class 7 Maths (Rationalised Contents). Here you can find the NCERT Solutions for Class 7
Maths Chapter 13 Visualising Solid Shapes Ex 13.4.
- NCERT Solutions for Class 7 Maths Chapter 13 Visualising Solid Shapes Ex 13.1
- NCERT Solutions for Class 7 Maths Chapter 13 Visualising Solid Shapes Ex 13.2
- NCERT Solutions for Class 7 Maths Chapter 13 Visualising Solid Shapes Ex 13.3
- NCERT Solutions for Class 7 Maths Chapter 13 Visualising Solid Shapes Ex 13.4
Ex 13.4 Class 7 Maths Question 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).
Solution:
When the light bulb is kept just above the given solids, we get the
following shapes as shadows.
(i) A ball: The shape of the shadow obtained is a circle.
(ii) A cylindrical pipe: The shape of the shadow obtained is a rectangle.
(iii) A book: The shape of the shadow obtained is a rectangle.
Ex 13.4 Class 7 Maths Question 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!)
Solution:
(i) The given shadow corresponds to a sphere, a cylinder or a cone.
(ii) The given shadow corresponds to a cube.
(iii) The given shadow corresponds to a prism or a pyramid.
(iv) The given shadow corresponds to a cuboid or a cylinder.
Ex 13.4 Class 7 Maths Question 3.
Examine if the following are true statements:(i) The cube can cast a shadow in the shape of a rectangle.
(ii) The cube can cast a shadow in the shape of a hexagon.
Solution:
(i) The given statement is true.
(ii) The given statement is false.
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