Question

calculating speed
a cross - country skier can complete a 7.5 km race in 45 min. what is the skiers average speed?
km/h

Explanation:

Step1: Convert time from minutes to hours

Since \(1\) hour \( = 60\) minutes, then \(t=45\) min \(=\frac{45}{60}\) h \( = 0.75\) h.

Step2: Use the speed formula \(v=\frac{d}{t}\)

Given \(d = 7.5\) km and \(t=0.75\) h. Substitute into the formula: \(v=\frac{7.5}{0.75}\) km/h.
Calculate \(\frac{7.5}{0.75}=\frac{7.5\times100}{0.75\times100}=\frac{750}{75}=10\) km/h.

Answer:

\(10\)