Answered

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John's mother left the market at 5.30 p.m. and arrived home after three hours. What was her speed, if she covered a distance of 120 km?​

Sagot :

sqdancefan

Answer:

  40 km/h

Step-by-step explanation:

You want to know the speed if 120 km were covered in 3 hours.

Speed

The relation between time, speed, and distance is ...

  [tex]\text{speed}=\dfrac{\text{distance}}{\text{time}}\\\\\\\text{speed}=\dfrac{120\text{ km}}{3\text{ h}}=40\ \dfrac{\text{km}}{\text{h}}[/tex]

Her speed was 40 km per hour.

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Additional comment

The units of the answer tell you how to compute it. "Kilometers per hour" means "kilometers divided by hours."

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