John took 45 minutes to bicycle to his grandmothers house a total of four kilometers what was his velocity in km hr?

To calculate John's velocity in km/hr, we need to convert the time from minutes to hours. Here are the steps to get the answer:

Step 1: Convert the time from minutes to hours.
Since there are 60 minutes in an hour, we divide the time in minutes by 60 to get the time in hours.
45 minutes ÷ 60 = 0.75 hours

Step 2: Calculate the velocity.
Velocity is defined as the distance traveled divided by the time taken. In this case, the distance John traveled was 4 kilometers, and the time taken was 0.75 hours.
Velocity = Distance ÷ Time
Velocity = 4 km ÷ 0.75 hr
Velocity ≈ 5.33 km/hr

Therefore, John's velocity, when cycling to his grandmother's house, is approximately 5.33 km/hr.

speed= distance/time= 4km/.75hr= 16/3 km/hr