Question

A papaya tree was planted 2 years ago. It increases at the rate of 20% every year. If at present, the height of the tree is 540 cm, what was its height when the tree was planted?

• A. 400 cm
• B. 375 cm
• C. 324 cm
• D. 432 cm

Answer 1

The Correct Option is B

Let the height at time of plantation be h.
At present the height is 540 cm

\(\Rightarrow \) 540 = \(\frac{6}{5}\times \frac{6}{5}\times h\)

\(\Rightarrow \) \(\frac{36}{25h} = 540\)
h = \(540\times \frac{25}{36}\) 

= 375 cm

Therefore, The correct option is (B): 375 cm.