RD Sharma Solutions Class 7 Visualising Solid Shapes Exercise 19.1

RD Sharma Solutions Class 7 Chapter 19 Exercise 19.1

RD Sharma Class 7 Solutions Chapter 19 Ex 19.1 PDF Free Download

Exercise 19.1

Q1: Complete the following table and verify Euler’s formula in each case.

1

A1:

2

Hence Euler’s formula is verified for these figures.

 

 

Q2: Give three examples from our daily life which are in the form of

(i) a cone

(ii) a sphere

(iii) a cuboid

(iv) a cylinder

(v) a pyramid.

A2: 

Examples of

(i) Cone: Ice-cream cone, clown cap, rocket

(ii) Sphere: Football, a round apple, an orange

(iii) Cuboid: book, brick, duster

(iv) Cylinder : circular pipe, glass, circular pole

(v) Christmas decorations, cheese and patio umbrellas.


Practise This Question

Ted’s uncle wants to put tiles on his home floor. The total area of the floor wherever he wants tiles is 360000 square cms. Find the cost of tiling at Rs. 20 per square meter.