1) V = 8 km/h, S = 3 km, t = ? (in minutes)

To find the time (t) in minutes, we can use the formula:

t = S / V

t = 3 km / 8 km/h
t = 0.375 hours

We need to convert hours to minutes:

1 hour = 60 minutes
0.375 hours = 0.375 * 60 = 22.5 minutes

So, t = 22.5 minutes

2) V = 10 km/h, S = 3 km, t = ? (in minutes)

Using the same formula as above:

t = S / V

t = 3 km / 10 km/h
t = 0.3 hours

Converting hours to minutes:

0.3 hours = 0.3 * 60 = 18 minutes

So, t = 18 minutes