Home › LIC AAO › Quantitative Aptitude › Percentages › If the sides of a square are increased by 10%, b…
If the sides of a square are increased by 10%, by what percent does the area increase?
A20%
B21%
C10%
D25%
Answer & Solution
Correct answer: B. 21%
1. New side = 1.10 × old side.
2. New area = (1.10)² = 1.21 × old area.
3. Increase = 21%.
_Source: jkchrome Percentage QB, p.4 — area % change_
Related questions
A city of 20,000 people growing at 5% a year from 1997 reaches, by the end of 2000, about:On 12000 at 10% per annum compounded half yearly, the interest for the first six months isIf interest is compounded quarterly, the quarterly rate is:For half yearly compounding, the rate used in each period is:When interest is compounded half yearly, the number of conversion periods in a year is:The time period after which interest forms a new principal is called the:Compound interest on 12600 for two years at 10% per annum works out to:Once the amount is known, compound interest is found as: