Matematică, întrebare adresată de tomuletana, 8 ani în urmă

A cyclist travels 2 miles in 10 minutes and then a further 6 miles in 20 minutes without stopping.
Calculate the cyclist's average speed in mph.


mbc220861: If mph means miles per hour, the solution is as follows:
mbc220861: (the first speed+the second speed)/2 = (12+18)/2 = 30/2= 15 mph (miles per hour)

Răspunsuri la întrebare

Răspuns de mbc220861
0

Răspuns:

The cyclist's average speed in mph = 24140.1 mph

Explicație pas cu pas:

2 miles in 10 minutes, this means that he will travel 12 miles in 60 minutes.

12 miles converted in meters: 12x1609.34= 19312.08 metres.

The first speed: V = 19312.08 mph

6 miles in 20 minutes, this means that he will travel 18 miles in 60 minutes.

18 miles converted in meters: 18x1609.34=28968.12 metres.

The second speed: V = 28968.12 mph

The average speed = (the first speed + the second speed)/2

The cyclist's average speed = (19312.08+28968.12 )/2

= 24140.1 mph

Alte întrebări interesante