NCERT Solutions Class 7 Mathematics
Chapter – 15 (Visualising Solid Shapes)
The NCERT Solutions in English Language for Class 7 Mathematics Chapter – 15 Visualising Solid Shapes Exercise 15.4 has been provided here to help the students in solving the questions from this exercise.
Chapter : 15 Visualising Solid Shapes
- NCERT Solution Class 7 Maths Exercise – 15.1
- NCERT Solution Class 7 Maths Exercise – 15.2
- NCERT Solution Class 7 Maths Exercise – 15.3
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).
Solution –
The shape of the shadow obtained from a ball is circle.
(ii)
The shape of the shadow obtained from a cylindrical pipe is rectangle.
(iii)
The shape of the shadow obtained from a book is 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!)
Solution –
(i) Cricket ball, water bottle cap, Disc
(ii) Die, chalk box etc.
(iii) Birthday cap etc.
(iv) 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.
(ii) The cube can cast a shadow in the shape of a hexagon.
Solution –
(i) The cube can cast a shadow in the shape of a rectangle.
The above statement is true.
(ii) The cube can cast a shadow in the shape of a hexagon.
The above statement is false.
