If the car goes 69 mph divide by 3 with a square root of 3 and with the length and width of its vehicle and the mass capacity of the engine multiply using the hypotenus formula So technically, 85% of 3 years translates to: 2 years, 6 months, 18 days. since the car is solid andhas a wiight of 300lb calculate the volume of a cylinder I need to calculate how long it will take me to drive to Chicago. We calculated the cost of new carpeting for the whole house. We need to calculate our chances of success before we invest more money in the business.