The oil in a lawn mower needs to be changed every 28 hours. If the mower travels 100 feet in 30 seconds and shuts off when stopped, how many miles will it travel between oil changes?

Question

Quizplus · Accepted Answer

To find the total distance travelled between oil changes, we need to first find the time it takes for the mower to reach 28 hours of operation. If the mower travels 100 feet in 30 seconds, it covers a distance of (100/5280) miles in 30 seconds. To cover 1 mile it needs to travel 5280 feet and hence it will take 30*(5280/100) seconds to travel one mile. So, the time taken to travel 1 mile is 1584 seconds.

Now, we need to find how many miles are covered in 28 hours, which is 28*60*60/1584 = 1260 miles (rounded to the nearest mile).

Therefore, between oil changes, the mower will travel approximately 1260 miles.

Among the answer choices, only option B (63.6 mi) is closest to the correct answer.

The Oil in a Lawn Mower Needs to Be Changed