A catalog of scientific equipment states that the lens of a particular telescope has an area of 3.14 square feet. What is the le
ns's circumference?
1 answer:
Answer: 6.28 feet
Step-by-step explanation:
Area of the lens= πr^2
Since area has been given as 3.14
3.14 = πr^2
Note that π = 3.14
3.14 = 3.14r^2
r^2 = 3.14/3.14
r^2 = 1
r = ✓1
r = 1
The radius of the lens is 1
Circumference of the lens= 2πr
= 2 × 3.14 × 1
= 6.28 feet
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