9514 1404 393
Answer:
- initial estimate: 60 cm²
- better estimate: 62.8 cm²
Step-by-step explanation:
The total surface area of a cone with radius r and slant height s is ...
A = πr² +πrs = πr(r +s)
For the given dimensions and π≈3, the area is approximately ...
3(2 cm)(2 cm +8 cm) = 60 cm²
For π≈3.14, the area is approximately ...
(20cm²)(3.14) = 62.8 cm²
