## MP Board Class 7th Maths Solutions Chapter 15 Visualising Solid Shapes Ex 15.4

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.

Solution:

The shapes of the shadows of these figures will be as follows.

(i) A ball

The shape of the shadow of a 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:

The given shadows can be obtained in case of the following objects.

(i) Compact disk

(ii) A dice

(iii) Triangular pyramid

(iv) NoteBook

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:

A cube can cast a shadow only in the shape of a square. Therefore, any other shape is not possible.