First, you have to find the circumference. The circumference, based on the equation of 2rπ, comes out as 20π. Since you have to find the length of the arc that is 60 degrees, divide 60 by 360 to see how much of the circle 60 degrees is. It results in 1/6, so then you simply have to multiply 20π by 1/6.
1/6 of an hour is 10 minutes because there are 60 minutes in an hour so 60/6=10 so it's 25m^2/10minutes now just multiply 25 by 12 ( 12 lots of 10 minutes in 2 hours) 25*12=300 answer is 300m^2
