Subject: Mathematics
Book: Maths Mastery
The total surface area of a sphere, often used for planetary or ball measurements, is given by 4πr², where r is the sphere’s radius. For example, if a sphere has a radius of 6 cm, its surface area is 4π × 6² = 144π cm². This calculation is instrumental in many scientific and engineering fields (e.g., heat transfer, atmospheric analysis) and everyday contexts like manufacturing spherical tanks or sports equipment. Familiarity with this formula complements the sphere volume formula to provide a full understanding of spherical geometry.
If the radius of a circle is 7 cm, what is its circumference?
View QuestionIf the cost price of an item is Rs. 400 and the selling price is Rs. 500, what is the profit percentage?
View QuestionWhat is the LCM of 15 and 20?
View QuestionIf a = 5 and b = 12, what is the length of the hypotenuse of a right triangle?
View QuestionIf sin(A) = 3/5 and cos(B) = 5/13, where A and B are acute angles, what is sin(A+B)?
View QuestionThe probability of getting an even number when rolling a die is:
View QuestionIf a number is divisible by 9, it is also divisible by which of the following?
View QuestionWhat is the sum of the first 50 positive integers?
View QuestionWhat is the probability of drawing a king from a standard deck of 52 playing cards?
View QuestionIf a+b = 10 and ab = 21, what is the value of a^3 + b^3?
View Question