Ncert Solutions For Class 8 Maths Ex 15.3

Ncert Solutions For Class 8 Maths Chapter 15 Ex 15.3

 Q1)

Draw the graphs for the following tables, with suitable scales on the axes.

  • Cost of the Apple

 

Number of Apple Cost(in $)
1 5
2 10
3 15
4 20
5 25

 

  • Distance travelled by the car
Time (in hours) Distance (in km)
6 a.m. 40
7 a.m. 80
8 a.m. 120
9a.m. 160

 

  • How much distance did the car cover during the period 7.30 a.m. to 8 a.m.?
  • What was the time when the car had covered a distance of 100 km from the car start?
  • Interest on deposits for a year.
Deposit (in Rs.) Simple Interest (in $)
1000 80
2000 160
3000 240
4000 320
5000 400

 

(i) Does the graph pass through the origin?

(ii) Use the graph to find the interest on $2500 for a year.

(iii)To get an interest of $280 per year, how much money should be deposited?

Ans.1)

(a)

14

(b) (i) The car covered 20 km distance.

(ii) It was 7.30 am when it covered 100 km distance.

15

(i) Yes, the graph passes through the origin.

(ii) Interest on $2500 is $200 for a year.

(iii) $3500 should be deposited for interest of $280

16

 

Q2.)

Draw a graph for the following.

(i)

Side of Square(in cm) Perimeter(in cm)
2 8
3 12
3.5 14
5 20
6 24

Is it a linear graph?

(ii)

Side of Square(in cm) Area(in cm2
2 4
3 9
4 16
5 25
6 36

Is it a linear graph?

Ans 2)

(i) Yes, it is a linear graph.

17

(ii) No, it is not a linear graph because the graph does not provide a straight line.

18