So for every 6 people with a car, there are another 5 that own an SUV, or expressed the other way around, for every 5 SUVs, there's one extra car. If there are 200 extra cars, that means there are 5 × 200 SUVs = 1000 SUVs, and 1200 cars.
Now let's just quickly test if the math is correct, and if the ratio of cars to SUVs is still 6:5: 1200 : 1000 << get rid of the 00 12 : 10 << divide by two 6:5 Yep, math is correct.
Answer: There are 1200 people who own cars, and 1000 people who own SUVs.
Because vol= length x width x height , and assuming that the height is 11.5 because breadth means width but you already have a width then, vol= 11.5 x 7.4 x 11.5, vol = 978.65
