Largest possible common factor

Answer this question only if you know the answer! 30 points and

Fiona races bmx around a circular dirt course. if the radius of the course is 70 meters, what is the total distance fiona covers in two laps of the race? a. about 30,772 meters b. about 15,386 meters c. about 879.2 meters d. about 439.6 meters e. about 219.8 meters23 points hurry

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16