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Maths 2 Marks Questions

Introduction to Graphs · Jharkhand Board (JAC) STD 8 (Jharkhand - English Medium). 6 questions.

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2 Marks Questions

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6 questions · self-marked practice — reveal the answer and mark yourself.

Question 12 Marks
For an experiment in Botany, two different plants, plant $A$ and plant $B$ were grown under similar laboratory condition. Their heights were measured at the end of each week for $3$ weeks. The results are shown in the graph. During which week did Plant $B$ grow least?
Answer
From the graph, it is clear that
Growth of plant $B$ during $1^{st}$ week: $= 1 - 0 = 1\ cm$
Growth of plant $B$ during $2^{nd}$ week: $= 7 -1 = 6\ cm$
Growth of plant $B$ during $3^{rd}$ week: $= 10 -7 = 3\ cm$
Hence, plant $B$ grew the least in $1$st week i.e. $1\ cm$
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Question 22 Marks
For an experiment in Botany, two different plants, plant $A$ and plant $B$ were grown under similar laboratory condition. Their heights were measured at the end of each week for $3$ weeks. The results are shown in the graph. During which week did Plant $A$ grow most?
Answer
From the graph, it is clear that
Growth of plant $A$ during $1^{st}$ week: $= 2 - 0 = 2\ cm$
Growth of plant $A$ during $2^{nd}$ week: $= 7 - 2 = 5\ cm$
Growth of plant $A$ during $3^{rd}$ week: $= 9 - 7= 2\ cm$
Hence, $A$ grew the most in its $2^{nd}$ week i.e. $5\ cm.$
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Question 32 Marks
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 graph. How much did Plant $B$ grow from the end of the $2^{nd}$ week to the end of the $3^{rd}$ week?
Answer
From the graph, it is clear that the growth of plant $B$ from the end of $2^{nd}$ week to the end of $3^{rd}$ week $= 10 - 7 = 3\ cm$
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Question 42 Marks
For an experiment in Botany, two different plants, plant $A$ and plant $B$ were grown under similar laboratory condition. Their heights were measured at the end of each week for $3$ weeks. The results are shown in the graph. How much did Plant $A$ grow during the $3\ rd$ week?
Answer
From the graph, it is clear that the growth of plant $A$ during $3^{rd}$ week $= 9 - 7 = 2\ cm$
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Question 52 Marks
For an experiment in Botany, two different plants, plant $A$ and plant $B$ were grown under similar laboratory condition. Their heights were measured at the end of each week for $3$ weeks. The results are shown in the graph. How high was Plant $B$ after $(i) 2$ weeks $(ii) 3$ weeks?
Answer
From the graph, it is clear that$-$
$i.$ After $2$ weeks, the height of plant $B$ was $7\ cm$.
$ii.$ After $3$ weeks, the height of plant $B$ was $10\ cm$.
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Question 62 Marks
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 graph. How high was Plant $A$ after $(i) 2$ weeks $(ii) 3$ weeks?
Answer
From the graph, it is clear that-
$i.$ After $2$ weeks, the height of plant $A$ was $7\ cm$.
$ii.$ After $3$ weeks, the height of plant $A$ was $9\ cm$.
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