Question

A cyclist travels 6.7 km in 30 minutes. What is his average speed in km/h?​

Answer 1

Answer:

$\implies \footnotesize \text{ Average Speed} = \dfrac{ \text{Total Distance}}{ \text{Total time}}$

• 30 min = ½ hr.

$\implies \footnotesize \text{ Average Speed} = \dfrac{ 6.7 \: km}{ \frac{1}{2} \: hr }$

$\implies \footnotesize \text{ Average Speed} = 6.7 \times 2 \: km/h$

$\implies \footnotesize \textbf{ Average Speed = 13.4 \: km/h}$

Answer 2

His rate is 13.4km/ hour

Data;

• Distance = 6.7km
• Time = 30 minutes

Conversion From Minutes to Hours

To solve this problem, we have to convert his speed from km/min to km/h

$60min =1 hour$

Since his rate is 6.7kmin 30 minutes, let's convert it to hour

$6.7km = 30min\\x km = 1min\\x = \frac{6.7}{30} \\x = 0.223km/min$

But to convert minutes to hours, we have to divide the time by 60

$0.223\frac{km}{min}*60/1 = 13.4$

From the calculation above, his rate is 13.4km/ hour

Learn more on conversion from minutes to hours here;

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