Question
A solid cylinder has the total surface area 231 sq.cm.
If its curved surface area is of the total surface area, then the volume of the cylinder isSolution
Total surface area = 231 cm2 Curved surface area = 2/3 x 231 = 154 cm2 Curved surface area of cylinder = 2πrh ⇒ 2πrh = 154 ⇒ 2 × (22/7) × r × h = 154 ⇒ r × l = 24.5 Total surface area of cylinder = 2πr(r + h) ⇒ 2πr(r + h) = 231 ⇒ r(r + h) = 36.75 ⇒ r2 + rh = 36.75 ⇒ r2 = 36.75 - 24.5 ⇒ r2 = 12.25 ⇒ r = 3.5 cm Volume of cylinder = πr2h ⇒ π × r × (r × h) ⇒ π × 3.5 × 24.5 ⇒ 269.5 cm ∴ The volume of the cylinder is 269.5 cm3 .
Consider the following statements about unemployment:
1. Frictional unemployment occurs due to short-term transitions in the labor market.
Match the following women with their achievements:
- The Sao Joao festival is a traditional annual celebration in which Indian state?
Which of the following countries is not a part of the European Free Trade Association block?
World Refugee Day is celebrated on which of the following days?
Tanjore Balasaraswati was a dancer of which of the following dance forms?
Which Gurudwara is located near Pratap Gate in Kaithal town of Haryana?
Who authored the book Hind Swaraj, which discusses self-rule and critiques modern civilization?
- Which individual was confirmed by the US Senate as the Director of the National Institutes of Health (NIH)?
- In which month of the Hindu calendar is the famous Jagannath Rath Yatra held?
