NCERT Solutions for Class 8 Mathematics Chapter 15
Important NCERT Questions
Introduction to Graphs Chapter 8 Exercise 15.1
NCERT Books for Session 2022-2023
CBSE Board
Questions No: 3
For an experiment in Botany, two different plants, plant A and plant B were grown under similar laboratory conditions. Their heights were measured at the end of each week for 3 weeks. The results are shown by the following graph. (a) How high was Plant A after (i) 2 weeks (ii) 3 weeks? (b) How high was Plant B after (i) 2 weeks (ii) 3 weeks? (c) How much did Plant A grow during the 3rd week? (d) How much did Plant B grow from the end of the 2nd week to the end of the 3rd week? (e) During which week did Plant A grow most? (f) During which week did Plant B grow least? (g) Were the two plants of the same height during any week shown here? Specify.
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(a) (i) The plant A was 7 cm high after 2 weeks and
(ii) after 3 weeks it was 9 cm high.
(b) (i) Plant B was also 7 cm high after 2 weeks and
(ii) after 3 weeks it was 10 cm high.
(c) Plant A grew = 9 cm – 7 cm = 2 cm during 3ʳᵈweek.
(d) Plant B grew during end of the 2 ⁿᵈ week to the end of the 3ʳᵈ week = 10 cm – 7 cm = 3 cm.
(e) Plant A grew the highest during second week.
(f) Plant B grew the least during first week.
(g) At the end of the second week, plant A and B were of the same height.
Class 8 Maths Chapter 11 Exercise 15.1 Solution in Video
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