Question
A solid cylinder of radius 7 cm and height 15 cm is
melted and recast into small cones each of radius 3.5 cm and height 6 cm. How many cones are formed?Solution
ATQ, Volume of cylinder = pi r2 h = pi x 72 x 15 = 735pi Volume of one cone = (1/3)pi r^2 h = (1/3)pi x (3.5)2 x 6 = 2pi x 12.25 = 24.5pi Number of cones = 735pi / 24.5pi = 30
Which of the following matrices is both symmetric and skew-symmetric?
A ladder leaning against a wall makes an angle of 60° with the ground. If the ladder is 10 meters long, how high up the wall does it reach?
69 73 64 80 ? 91
Integrated circuits are made up of:
The sum of the ages of a father and his son is 50 years. After 5 years, the father's age will be twice that of his son. What are their present ages?
67.2, 8.4, 1.2, 0.2, 0.04, ?
Calculate the simplified value of the given expression:
...
(5 + 13 of 7 - 5.25 of 8 + 63) ÷ 18What is the total number of packages delivered in February across all regions, and what percentage does it contribute to the total packages delivered in...
315 people went to a park. The number of men is 25 more than the number of women and the number of adults is 15 more than the number of children. How ma...
Relevant for Exams:
