Subject: Mathematics
Book: Maths Mastery
A cone’s lateral surface area is given by πrl, where r is the radius of the base and l is the slant height (the distance from the tip of the cone to any point on the perimeter of the base). For instance, if r=4 cm and the slant height l=9 cm, the lateral area is π × 4 × 9 = 36π cm². This formula is especially important in designing conical shapes like funnels, ice cream cones, or architectural features (spires). Understanding the distinction between slant height and perpendicular height is crucial for correct applications of the lateral surface area formula.
If the radius of a circle is doubled, what happens to its area?
View QuestionThe sum of the squares of two consecutive integers is 145. What are the integers?
View QuestionIf 3x = 81, what is the value of x?
View QuestionIf the perimeter of a square is 36 cm, what is the length of its diagonal?
View QuestionIf 2a + b = 10 and a - b = 4, what is the value of a?
View QuestionIf two complementary angles differ by 30°, what are the angles?
View QuestionIf x:y = 4:5 and y:z = 2:3, what is x:z?
View QuestionHow many ways can 4 people sit in a row?
View QuestionA train 150 m long passes a pole in 15 seconds. What is its speed?
View QuestionWhat is the HCF of 72 and 120?
View Question