by 20, 480 miles
by 20%, 400 miles
20 x 25 = 500 square miles.
500 miles.
500 mi / 20 mpg = 25 gallons.
500 - 17% = 415
320 decreased by -20 = 300
500 - 13% = 87% of 500 = 500*87/100 = 435
8 hours 20 minutes.
When 25 is decreased by 20% the result 20.
450 decreased 20% results in: 360
500 miles 500 miles 500 miles
Answer: 500 km = 310.685 miles so 500 miles is greater.
Well if typical car hold 10 gallons, then it will do about 300 miles, (average 30 miles/gallon). so 500 miles trip will requires about 20 gallons of gas. NOTE: if your vehicle does 20-30 miles/gallons, it will require more gas. (estimate 30-40 gallons)