speed = 15.
speed = distance/time
speed = 600/time
simplify
600/10 = 60/4 = 15.
15 miles /seconds ; Explanation: ; Distance = 600m ; Time = 40 seconds.
What is speed and how is it used?
“Speed” is a street name for various stimulant drugs that teens, young adults, and others use to feel more alert and focused, and in some cases, to feel high. Some people also use various forms of speed to reduce their appetite. Types of speed include: Amphetamines (used to treat ADHD, narcolepsy, and depression)
What does speed refer to?
Speed is the street name for amphetamine sulfate, although it's sometimes used to refer to other amphetamines. It's usually an off-white or pinkish powder and can sometimes look like crystals. It's also available in a paste form which is usually white/grey or brown in color and can be damp and gritty.
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