Arithmetichard · Past Paper
The ratio of the number of sides of two regular polygons is 1:2 and the ratio of their interior angles is 3:4. The number of sides are:
A4, 8
B5, 10
C6, 12
D3, 6
✓ Correct Answer: B — 5, 10
Sides n, 2n. Angles [(n-2)*180/n] / [(2n-2)*180/(2n)] = 3/4. Simplifying gives n=5. Sides are 5 and 10.
Share this question
More from Arithmetic
- In a bag, there are Rs 1, 50p, and 25p coins in the ratio 5:6:8. If the total amount is Rs 210, find the number of 50p coins.
- A man buys a cycle for Rs. 2500 and spends Rs. 500 on its repair. He sells it for Rs. 3300. Find his profit %.
- Find 0.1% of 100000.
- A shopkeeper buys 10 oranges for Rs. 8 and sells 8 oranges for Rs. 10. Find gain %.
- Find 12.5% of 800.