There is too much information given, it's hard to understand exactly which variables are important in this problem.
Answer:
The volume of 3200 kg of petrol is 4 m^3.
It’s gonna be Oxygen ....
1) 15 / 12 = 1.25 ratio
2) to increase acceleration 1.25 times (with same F, or same engine) you have to lower mass 1.25 times
3) 1515/1.25 = 1212 kg
choose A
Elliptical and Spiral have some similarities, they both are huge and contain lost of dust and also they are held by gravitational forces.
