A soap bubble has a radius of 5 cm. What is the surface area of the bubble?
Practice Questions
Q1
A soap bubble has a radius of 5 cm. What is the surface area of the bubble?
100π cm²
50π cm²
25π cm²
20π cm²
Questions & Step-by-Step Solutions
A soap bubble has a radius of 5 cm. What is the surface area of the bubble?
Step 1: Identify the formula for the surface area of a sphere, which is 4πr².
Step 2: Determine the radius of the soap bubble, which is given as 5 cm.
Step 3: Substitute the radius (r = 5 cm) into the formula: 4π(5)².
Step 4: Calculate (5)², which equals 25.
Step 5: Multiply 25 by 4, which equals 100.
Step 6: The surface area is now 100π cm².
Surface Area of a Sphere – The formula for the surface area of a sphere is derived from geometric principles and is given by 4πr², where r is the radius.
