A student walked 1.5 km in 25 minutes, and then, realizing he was late, ran the remaining 0.5 km in 5 minutes. calculate his average speed on the way to school.

Question

asked Oct 6, 2021 131k views

1 Answer

Luigino · Answer 1 · 2021-10-11T07:12:43+0000

The average speed is 4 kilometer per hour

Solution:

Average Speed is given by formula:

$\text{ Average speed } = \frac{\text{ total distance }}{\text{ total time }}$

A student walked 1.5 km in 25 minutes and then, realizing he was late, ran the remaining 0.5 km in 5 minutes

Therefore,

Total distance = 1.5 km + 0.5 km = 2 km

Total time taken = 25 minutes + 5 minutes = 30 minutes

Convert 30 minutes to hour

$1 \text{ minute } = (1)/(60) \text{ hour }$

$30 \text{ minute } = (1)/(60) * 30 \text{ hour } = 0.5hour$

Substituting the values in above formula,

$\text{ Average speed } = (2)/(0.5) = 4 \text{ kilometer per hour }$

Thus average speed is 4 kilometer per hour