## anonymous one year ago Fan & Medal What is the surface area? http://static.k12.com/eli/bb/817/-1/0/2_36869_44974/-1/5c45df68fdad740c9f94d22ea5f92dd60c7a03f7/media/7e029ea22c7d7523591ecd9f4f977f59e4b10892/mediaasset_651527_1.jpg

1. anonymous

@mathmate @mathway @DullJackel09 @-Welp- @oleg3321 @SidS. @Concentrationalizing @steffie84

2. anonymous

is it 50.80 m^2

3. mathmate

|dw:1438736864958:dw| Lateral area of a cone is $$A_L =\pi r l=\pi (2.1)(5.6)~m^2$$ If total surface area is required, add area of base, $$A_b =\pi r^2 = \pi 2.1^2 ~m^2$$

4. mathmate

Yes, your answer is correct. The total surface area is 36.95+13.85=50.80 m^2

5. anonymous

ok ..thanks . i just needed justification

6. mathmate

You're welcome! :) For justification, I have already given the formulas. Also, I verified your number to be correct.

7. anonymous

lol. i know i was saying thanks for the justification

8. mathmate

Good! :)