Question
The area of the base of a right circular cone is 81π
cm² and its height is 12 cm. What is the curved surface area (in cm2) of the cone?Solution
The area of the base of a right circular cone is 81π cm πr2 = 81π ⇒ r2 = 81 ⇒ r = 9 The height of the cone is 12 cm The slant height of the cone (l) is AC = √ (92 + 122) ⇒ AC = 15 The curved surface area of the cone is π × 9 × 15 ⇒ 135π ∴ The curved surface area of the cone is 135π cm2
As of April 26, 2023, how many cumulative enrolments have been achieved under the Pradhan Mantri Jeevan Jyoti Bima Yojana (PMJJBY)?
What is the minimum transfer limit for Real Time Gross Settlement (RTGS) as of June 2020?
P, Q, R, S, T and U are six friends. Which of the following is/are sufficient to compare heights of S and T?
1. R is shorter than P but taller...
Which one of the following elements has the highest boiling point?
From which country does Brookfield Asset Management Corporation originate, establishing itself as one of the world's largest alternative investment mana...
The Sundarbans delta is formed by the depositional action of the Ganga, Brahmaputra and which of the following rivers?Β
In which type of tax is the marginal tax rate higher than the average tax rate?
Who is known as the father of Civil-Services in India?
What is the height of elevation of the Peninsular plateau?
Siachen in Himalayas is: