Answered

From everyday questions to specialized queries, IDNLearn.com has the answers. Ask your questions and receive prompt, detailed answers from our experienced and knowledgeable community members.

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 :

Sqdancefanidn

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 are delighted to have you as part of our community. Keep asking, answering, and sharing your insights. Together, we can create a valuable knowledge resource. For trustworthy answers, rely on IDNLearn.com. Thanks for visiting, and we look forward to assisting you again.