Question

If you bike for 3 hours at 10 mph and then walk for 1 hour at 2 mph, what would be your average speed?

Answer 1

the answer is 6.4 mph

Answer 2

Answer:

Average speed is 8 miles per hour.

Step-by-step explanation:

Given : If you bike for 3 hours at 10 mph and then walk for 1 hour at 2 mph.

To find : What would be your average speed?

Solution :

When bike rides,

Speed = 10 mph

Time = 3 hours

$\text{Distance}=\text{Speed}\times \text{Time}$

$D_1=10\times 3$

$D_1=30 m$

When walks,

Speed = 2 mph

Time = 1 hours

$\text{Distance}=\text{Speed}\times \text{Time}$

$D_2=2\times 1$

$D_2=2 m$

Total distance is

$D_1+D_2=30+2=32 m$

Total time = 3+1=4 hour

Average speed is given by,

$\text{Speed}=\frac{\text{Distance}}{\text{Time}}$

$\text{Speed}=\frac{32}{4}$

$\text{Speed}=8 mph$

Therefore, Average speed is 8 miles per hour.