Question

A tree increases annually by $\frac{1}{10}$ th of its height, By how much will it increase after $2$ years, if it stands today $500$ cm high?

• A. $521$
• B. $601$
• C. $705$
• D. $605$

Answer 1

The correct option is D $605$

Present height $h=500cm$

After one year, $h=500+\frac{1}{10}\times 500=550cm$

After two years, $h=550+\frac{1}{10}\times 500=605cm$

Hence after two years height$=605cm$