Question

The medicine capsule shown consist of a cylinder with a hemisphere at each end. The total length of the capsule is 15 millimeters. The diameter is 5 millimeters. Find total surface area with pie being 3.14.

Answer 1

Answer:

The surface area of capsule is 235.5 mm².

Step-by-step explanation:

Given that,

Diameter = 5 mm

Total length = 15 mm

We need to calculate the radius of each hemisphere

Using formula of radius of hemisphere

$\text{radius of each hemisphere}=\text{radius of cylinder}$

$r=\dfrac{5}{2}$

$r=2.5\ mm$

We need to calculate the length of cylinder

Using formula of length

Length of cylinder = Total length of capsule-radius of left hemisphere- radius of right hemisphere

$\text{length of cylinder}=15-2.5-2.5$

$\text{length of cylinder}=10\ mm$

We need to calculate the surface area of capsule

Using formula of surface area of capsule

$\text{surface area of capsule}=\text{Curved surface area of cylinder}+\text{surface area of left hemisphere}+\text{surface area of right hemisphere}$

$\text{surface area of capsule}=2\pi rl+2\pi r^2+2\pi r^2$

$\text{surface area of capsule}=2\pi rl+4\pi r^2$

Put the value into the formula

$\text{surface area of capsule}=2\times3.14\times2.5\times10+4\times3.14\times(2.5)^2$

$\text{surface area of capsule}=235.5\ mm^2$

Hence, The surface area of capsule is 235.5 mm².