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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) 3weeks?(b) How high was Plant B after (i) 2 weeks (ii) 3weeks?(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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Answer» (a) (i) After 2 weeks, the height of plant A was 7 cm. (ii) After 3 weeks, the height of plant A was 9 cm. (b) (i) After 2 weeks, the height of plant B was 7 cm. (ii) After 3 weeks, the height of plant B was 10 cm. (c) Growth of plant A during 3rd week = 9 cm − 7 cm = 2 cm (d) Growth of plant B from the end of the 2nd week to the end of the 3rd week = 10 cm − 7 cm = 3 cm (e) Growth of plant A during 1st week = 2 cm − 0 cm = 2 cm (f) Growth of plant B during 1st week = 1 cm − 0 cm = 1 cm Growth of plant B during 2nd week = 7 cm − 1 cm = 6 cm Growth of plant B during 3rd week = 10 cm − 7 cm = 3 cm Therefore, plant B grew the least, i.e. 1 cm, during the 1st week. (g) At the end of the 2nd week, the heights of both plants were same. |
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