The present height of a tree is 847 cm . Find its height two years ago, if it increase at 10 percentage p.a .
Answers
The height of the tree two years ago, if it increases at 10 percentage p.a is 700 cm.
Step-by-step explanation:
The present height of the tree = 847 cm
Rate of growth, r = 10%
Time period, n = 2 years
Let the height of the tree 2 years ago be “h” cm.
Now, we have the formula,
Present height = h [1 + r/100]ⁿ
Substituting the given values in the above formula,
847 = h [1 + 10/100]²
⇒ 847 = h [110/100]²
⇒ h = [847 * 100] / [11 * 11]
⇒ h = 700 cm
Thus, the height of the tree 2 years ago is 700 cm.
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