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 3 weeks?
(b) How high was Plant B after 2 weeks?
(c) How much did Plant A grow during the 3rd
week?
(d) During which week did Plant B grow least?
Answers
Answer:
Ncert solutions
Grade 8
Mathematics
Science
Chapters in NCERT Solutions - Mathematics , Class 8
Exercises in Introduction to Graphs
Question 3
Q3) 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 in 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.
Solution:
(a) (i) 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 3rd week.
(d) Plant B grew during the end of the 2nd week to the end of the 3rd week = 10 cm – 7 cm = 3 cm.
(e) Plant A grew the highest during the second week.
(f) Plant B grew the least during the first week.
(g) At the end of the second week, plants A and B were of the same height.