NCERT Class 7 Mathematics Solutions: Chapter 15 – Visualising Solid Shapes Exercise 15.4 Part 1

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Advantage of solid Models

Advantage of Solid Models

Advantage of solid Models

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).

In given figure, a ball, a cylindrical, a book

In Given Figure, a Ball, a Cylindrical, a Book

In given figure, a ball, a cylindrical, a book

Answer:

(i) A ball

Shape’s name: Circle

Shadow:

Circle shapes in its shadow

Circle Shapes in Its Shadow

Circle shapes in its shadow

(ii) A cylindrical pipe

Shape’s name: Line

Shadow:

Cylindrical pipe shapes in its shadow

Cylindrical Pipe Shapes in Its Shadow

Cylindrical pipe shapes in its shadow

(iii) A book

Shape’s name:

Rectangle shapes in its shadow

Rectangle Shapes in Its Shadow

Rectangle shapes in its shadow

Shadow: Rectangle