Am I doing this correctly?

Question

A wooden fence is 6 ft. high and 220 ft. long and needs to be painted on both sides.
a.) What is the total area to be painted?
b.) A gallon of a certain type of paint will cover only 200 sq. ft. of area for the first coat, but on the second coat a gallon of the same paint will cover 300 sq. ft. If the fence is to be given two coats of paint, how many gallons of paint should be bought?

For "A," I got 1640 sq. ft. Is this correct? And how do I figure out part "B"? Thanks so much for your help; it's greatly appreciated.

Answer 1

a. The total area to be painted is 6x220 (which is the area of one side of the fence only) x 2, or 2640sq.ft.
b. The first coat will need (2640/200) gallons, or 13.2 gallons. The second coat will need (2640/300) gallons, or 8.8 gallons. The total paint needed for 2 coats of paint is 13.2+8.8= 22 gallons.

*unless you are a really crappy painter, and you spill paint on the ground and all over yourself in the process, in which case you need more paint*

Answer 2

6x440 (both sides) =2640. divide by 200= 13 and a fifth gallons for the first coat divide by 300= 8 and 8/10 gallons. 8.8 + 13.2 =22 gallons