Nadya and Pavel are driving along a road. Nadya is travelling at a speed of #85 " feet per second "# and Pavel at #1600 " yards per minute"# Who was travelling faster?

1 Answer
Sep 27, 2016

Answer:

Nadya drove the fastest at #57.95 mph#

Explanation:

Although they are all speed, they are in different units. They need to be converted to the same unit before they can be compared.

Max: #55 mph#

Nadya: 85 feet per second .... she will drive 60 times further in a minute and 60 times further in an hour.

#85 xx 60 xx 60 = 306000 feet per hour.
There are 5,280 feet in a mile.

Nadya: #306000/5280 = 57.95 mph#

Pavel: 1600 yards per minute - he will drive 60 times further in an hour.

#1600 xx 60 =96,000# yards per hour
There are 1,760 yards in a mile

Pavel: #96000/1760 = 54.55 mph#

NOw we can compare: 55mph to 54.55 mph to 57.95mph

Nadya drove the fastest at #57.95 mph#