Final answer:
Kadri will take 9.6 hours if walking at 5 km/h, 0.8 hours if riding a bike at 60 km/h, and 0.48 hours if driving a car at 100 km/h, which is also 576 minutes for walking, 48 minutes for biking, and approximately 29 minutes for driving.
Step-by-step explanation:
To find out how long Kadri will take to travel a distance of 48 km, we need to use the formula: time = distance / speed.
Walking at 5 km/h:
time = 48 km / 5 km/h = 9.6 hours
Riding a bike at 60 km/h:
time = 48 km / 60 km/h = 0.8 hours
Driving a car at 100 km/h:
time = 48 km / 100 km/h = 0.48 hours
We can also convert these times into minutes. Walking: 9.6 hours is 576 minutes. Riding a bike: 0.8 hours is 48 minutes. Driving: 0.48 hours is approximately 29 minutes.
Finally, it's always good to check whether the answer is reasonable. For instance, if you walk 10 km in 2 hours (at 5 km/h), you'd expect to walk twice as far in 4 hours. This sanity check can help ensure we haven't made a mistake in basic arithmetic.