A M.A.S (Most Affordable Speed) is defined as the speed where the fuel consumption of a car is the lowest. The average family car consumes 3 liters of fuel per 36 kilometers at the M.A.S with only one passenger (the driver). A pickup truck consumes twice as much as a family car does. Assuming the fuel consumption of both cars rises by % of the original consumption for each additional passenger, how many km per litter would a pickup truck do if the driver has three additional passengers?
Answer(s): D
This is a question with a lot of dispensable text, it teaches us to focus on relevant information only. A family car consumes 1 liter for 12 Km, a pickup truck consumes twice as much, 1 liter for 6 Km. There are 3 additional passengers so the consumption rises by 10% .
A Super-Jet airplane is flying at an average speed of 500 miles per hour. The average speed of a Turbo-Prop airplane is 15% lower than that of a Super-Jet. How long will it take a Turbo-Prop airplane to fly 950 miles?
Answer(s): A
The average speed of a Turbo-Prop airplane is 85% of that of a Super-Jet airplane, meaning 425 mph. (15 % is 3/20 fraction, so 17/20 * 500 is 425).Traveling at 425 mph, it would take the airplane 2 hours to travel 950 miles.
A windmill is taking advantage of strong air currents in order to produce electrical energy. On a typical day the wind speed is around 20 mph and in that speed the windmill produces 800 kw/h (kilowatts per hour). On a stormy day a windmill produces 20% more energy. How much kw/h can three windmills produce in two hours on a stormy day?
On a stormy day, a windmill will produce 20% more energy. 20% of 800 is 160, so each windmill will give out 960 kw/h. Three windmills will give 3 x 960 = 2880, which is answer (a), but we want two hours so the answer is 2880 x 2 = 5760.
If 0.22z = 118.8, then z =
Because the answer choices are so far apart, you can ballpark this problem. Multiply both sides by 100 to eliminate the decimal points:22z = 11880, divide both sides by 22. z = 540.
If 0.45x = 101.25, then x =
Answer(s): B
Because the answer choices are so far apart, you can ballpark this problem. Multiply both sides by 100 to eliminate the decimal points:45x = 10125, divide both sides by 45. x = 225.
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