Arithmeticmedium · Past Paper
If the side of a square is increased by 10%, its area increases by:
A10%
B20%
C21%
D100%
✓ Correct Answer: C — 21%
New area = (1.1s)^2 = 1.21s^2. Increase = 1.21 - 1 = 0.21 = 21%.
Share this question
More from Arithmetic
- Calculate 25% of 60.
- If $x/2 = y/3 = z/5$, then the ratio $(x+y+z)/z$ is:
- A shopkeeper sells two watches for Rs. 308 each. On one he gets 12% profit and on other 12% loss. Find his total gain or loss in Rs.
- Divide Rs 1200 among A, B, and C in the ratio 2:3:5. What is B's share?
- The sides of a triangle are in the ratio 2:3:4. If the perimeter is 18 cm, find the longest side.