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

A. 324 cm

B. 375 cm

C. 400 cm

D. 432 cm

Answer: Option B

Solution(By Examveda Team)

Height of the tree 2 years ago :
$$\eqalign{ & = \frac{{540}}{{{{\left( {1 + \frac{{20}}{{100}}} \right)}^2}}}cm \cr & = \left( {540 \times \frac{5}{6} \times \frac{5}{6}} \right)cm \cr & = 375\,\,cm \cr} $$