Question

Karen entered a 10K (K=kilometers) race and finished in 48 minutes. At what average rate did Karen run in kilometers er minute and in kilometers in hour?

Answer 1

Kilometers per minute:

10 km / 48 min = 2 • 5 km / 2 • 24 min = 5 km / 24 min = 5 / 24 kn / h

Kilometers per hour:

1 h = 60 min

1 min = 1 / 60 h

48 min = 48 • 1 / 60 h = 48 / 60 h =

12 • 4 / 12 • 5 h = 4 / 5 h

48 min = 4 / 5 h

10 km / 48 min = 10 km / ( 4 / 5 ) h =

5 • 10 km / 4 h = 50 km / 4 h =

2 • 25 km / 2 • 2 h = 25 / 2 km / h = 12.5 km / h

Answer 2

My typo.

5 km / 24 min = 5 / 24 km / min