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Question
A tree grows at the rate of 1/5th of its height annually. By how much height will it grow after 2 years, if its present height is 75 cms?
Options
108 cms
90 cms
144 cms
112 cms
Solution
108 cms
Explanation:
Rate of grow `= 100/5` = 20 %
time t = 2 years
Height of the tree after 2 years
`= 75 xx (1 + 20/100)^2`
= 75 × 1.44 = 108 cm
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