# I tried to solve this distance speed and time question, but I got quite stumped?

Dec 17, 2017

$4 k m \text{/} h$ is Misha's speed

#### Explanation:

With questions involving distance, speed and time, if you know two of the three values, you can calculate the third value.

The formula is:

$\text{Speed" = "Distance"/"Time"" } \leftarrow$ this gives 3 formulae:

$S = \frac{D}{T} \text{ " and" "T=D/S" "and" } D = S \times T$

For Dina:

$D = 10 k m \text{ "and" "S=5km"/} h$

Find the $\text{Time}$ she took: $\text{ } T = \frac{10}{5} = 2 h o u r s$

For Masha

$D = 8 k m \text{ }$(she still had 2km of the 10km left to cycle)

$T = 2 h o u r s \text{ }$(Dina and Masha started at the same time)

$S = \frac{D}{T} = \frac{10}{2} = 4 k m \text{/} h$