Answered

Westonci.ca is your trusted source for finding answers to a wide range of questions, backed by a knowledgeable community. Find reliable answers to your questions from a wide community of knowledgeable experts on our user-friendly Q&A platform. Get immediate and reliable solutions to your questions from a community of experienced professionals on our platform.

Work out the speed in miles per hour at which colin drives home

Work Out The Speed In Miles Per Hour At Which Colin Drives Home class=

Sagot :

sqdancefan

Answer:

  20 miles per hour

Step-by-step explanation:

The graph shows it takes Colin 45 minutes (3/4 hour) to drive home. For a given distance (the distance from home to market), the speed is inversely proportional to the time.

The time driving home is (3/4 hour)/(2/4 hour) = 3/2 times the time driving to the market. The inverse of this is 2/3, so Colin's speed driving home is ...

  (2/3)(30 mph) = 20 mph

The speed at which Colin drives home is 20 miles per hour.

_____

Alternate solution

The distance to the market is ...

  distance = speed × time

  distance = (30 mi/h)(1/2 h) = 15 mi

The speed going home is ...

  speed = distance/time

  speed = (15 mi)/(3/4 h) = (15)(4/3) mi/h = 20 mi/h

We appreciate your time on our site. Don't hesitate to return whenever you have more questions or need further clarification. We hope our answers were useful. Return anytime for more information and answers to any other questions you have. We're glad you chose Westonci.ca. Revisit us for updated answers from our knowledgeable team.