Question 23
The curved surface area and the diameter of a right circular cylinder are $$660 cm^2$$ and 21 cm respectively. Find its height (in cm).
Solution
Let height of cylinder = $$h$$ cm and radius, $$r=\frac{21}{2}$$ cm
Curved surface area = $$2\pi r h=660$$
=> $$2\times\frac{22}{7}\times\frac{21}{2}\times h=660$$
=> $$22\times3\times h=660$$
=> $$h=\frac{660}{66}=10$$ cm
=> Ans - (B)
Get AI Help
Create a FREE account and get:
- Free SSC Study Material - 18000 Questions
- 230+ SSC previous papers with solutions PDF
- 100+ SSC Online Tests for Free
