Question
Calculate the lateral surface
area of a right circular cone having a radius of 5 cm and a height of 12 cm.Solution
Given, Radius of the cone = 5 cm Height of the cone = 12 cm So, slant height of the cone = √(12² + 5²) = √(144 + 25) = √169 = 13 cm Thus, the lateral surface area of the cone = π × radius × slant height = π × 5 × 13 = 65π cm²
- The coins of ₹1, 50 paise, and 10 paise are in the ratio 6:5:9 in a collection. If the total money is ₹376.60, find the number of 10-paise coins.
A is thrice as efficient as B and C is twice as efficient as B. What is the ratio of number of days taken by A, B and C when they work individually?
The radii of two cylinders are in the ratio 1 : 4 and their heights are in the ratio 4 : 3.
Their volumes will be in the ratio ______.
In a class, the ratio of boys to girls is 3 : 2. If there are 45 students in total, how many boys are there?
In a group of 800 participants planning a community event, some opted for the role of organizers in a Science Fair, while others chose to organize a Tal...
A reduction in number of workers in the ratio of 9 : 13 and an increment of wages in the ratio 23 : 21, then the total wage is increased by?
Amit had 650 pens. He gave 40% of them to Suman and Rishi in the ratio 3:2. Find the difference between the number of pens left with Amit and the number...
Raju and Ramesh started a business with investing capital in the ratio of 9:16. After 5 months, Raju reduced his 1/3 portion of the capital and after 8 ...
- In a box, ₹5, ₹2 and ₹1 coins are present in the ratio 2:3:5. If the total value of coins is ₹609, then how many ₹1 coins are there?
The ratio of males and females in a zoo is 3:5 respectively and the percentage of children among males and the percentage of children among females are ...
Relevant for Exams:
