Question

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?

Answer 1

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`