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How long does it take to travel 1 mile at 65 mph?
1 hour = 3600 seconds 3600/65 = ~55.38 seconds
How long does it take a car to travel a mile doing 75 mph?
48 seconds 75 miles/1 hour = 1 mile / x hours 75/60minutes = 1 mile / y minutes 75/3600 seconds = 1 mile / z seconds 3600 = 75 z z = 3600/75 z = 48 seconds
How much percent is 20 of 3600?
First find 10% by dividing by 10. This gives 360. Then multiply by 2 to find 20%. 360 x 2 = 720 * * * * * True. But, in general, it is far simpler to mutiply 3600 by 20 and divide by 100 (or divide 3600 by 100 and then multiply by 20) Thus 3600/100 = 36 and 36*20 = 720. The above method is fine for 20% but try it with 13%. You find 10%. Then what? Take a tenth of the 10% to get 1% and then treble it to get 3%. Finally calculate 10%+3*1%. Possible, but plentry of room for error. Instead, all you need is 3600/100 = 36 and then 36*13 = 468!
How fast are you going if you take 23 seconds to complete one half mile?
3600/46 ie just over 78.26 mph
How many seconds does it take a car traveling 45mph to travel 420 feet?
1 mile = 5280 ft 1 hour = 3600 seconds 45mph = 45 x 5280 / 3600 ft/s =66ft/s 420ft / 66ft/s ~= 6.36 seconds
