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Question

A Leaf of 20 cm2 grows 5 cm2 per hour and B Leaf of 25 cm2 grows 5 cm2 per hour The relative growth rate of leaf A and B respectively is

A
25% and 20%
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B
20% and 25%
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C
50% and 100%
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D
25% and 50%
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Solution

The correct option is A 25% and 20%
Relative growth is the increase in size relative to the size of the plant leaf present at the start of a given time interval. It can be also expressed as percentage increase.

Relative Growth Rate =
Change in Parameter Time x Initial ParameterX100

Hence, for leaf A, relative growth = 520X100 = 25% .
For leaf B, relative growth =
525X100=20%.

So, the correct answer is 25% and 20%.

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