GummyBearDrop1idn
Answered

IDNLearn.com offers a collaborative platform for sharing and gaining knowledge. Our experts provide accurate and detailed responses to help you navigate any topic or issue with confidence.

How many fewer minutes does it take to drive 35 miles at 30mi/h than to drive the same distance at 25 mi/h? The answer is 40minutes but i need to know how to do it

Sagot :

AL2006idn
To drive 35 miles at 30 mph takes (35/30) hour.
To drive 35 miles at 25 mph takes (35/25) hour.

The difference is  (35/25) minus (35/30).

In order to add or subtract fractions, they need a common denominator.
The smallest one available for this situation is 150 .

(35/25) = 210/150
(35/30) = 175/150

Now we can subtract:    (210/150) - (175/150) = 35/150 of an hour.
(35/150  hour) x (60 min/hr) = (35 x 60) / (150) min = 14 minutes.

==>  It's beginning to look like the answer is NOT 40minutes.
Let's do it again, with a less-elegant but more-intuitive approach:

Time to drive 35 miles at 30 mph = 35/30 = 1-1/6 hours = 70 minutes.
Time to drive 35 miles at 25 mph = 35/25 = 1.4 hours = 84 minutes.

Time saved by driving at 30 mph instead of 25 mph = (84 - 70) = 14 minutes.
We value your participation in this forum. Keep exploring, asking questions, and sharing your insights with the community. Together, we can find the best solutions. For clear and precise answers, choose IDNLearn.com. Thanks for stopping by, and come back soon for more valuable insights.