Students can Download Class 7 Maths Chapter 15 Visualising Solid Shapes Ex 15.4 Questions and Answers, Notes Pdf, KSEEB Solutions for Class 7 Maths helps you to revise the complete Karnataka State Board Syllabus and to clear all their doubts, score well in final exams.
Karnataka State Syllabus Class 7 Maths Chapter 15 Visualising Solid Shapes Ex 15.4
Question 1.
A bulb is kept burning j ust 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:
(i) A ball: The shape of the shadow of the ball will be a circle.
(ii) A cylindrical pipe: The shape of the shadow of a cylindrical pipe will be a rectangle.
(iii) A book: The shape of the shadow of a book will be a rectangle.
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) A circle
3-D objects
Ball, Disc, Plate, etc.
(ii) A square
3-D objects
Die
(iii) A triangle
3-D objects
Ice cream cone, birthday cap
(iv) A rectangle
3-D objects
Book, Bblackboard, ruler, etc.
Question 3.
Examine if the following are true statements:
(i) The cube can cast a shadow in the shape of a rectangle.
Solution:
True.
(ii) The cube can cast a shadow in the shape of a hexagon.
Solution:
False.