Juma left his house 8:30 he drove a distance of 140km and arrived at 10:50a.m determine average speed in km/h
find the time in hours from 8:30 am to 10:50 pm as a decimal number
Rate = distance/time, (you know both)
10 hr 50 min - 8 hr 30 min = 2 hr 20 min
20 min = 20/60 = 1/3 hr
so drove for 2 1/3 hr =7/3 hr
140 km / (7/3) hr = 420/7 = 60 km/hr
To determine the average speed, you need to divide the distance traveled by the time taken.
First, let's calculate the time taken. Juma left his house at 8:30 a.m. and arrived at 10:50 a.m. So, the time taken is 10:50 a.m. - 8:30 a.m.
To do this calculation, we need to convert the time to a 24-hour format.
10:50 a.m. is equivalent to 10 + 12 hours = 22 hours 50 minutes.
8:30 a.m. is equivalent to 8 hours 30 minutes.
Now, subtract the start time from the end time:
22 hours 50 minutes - 8 hours 30 minutes = 14 hours 20 minutes.
Next, we need to convert the time to decimal form. Divide the number of minutes by 60 and add it to the number of hours:
20 minutes ÷ 60 = 0.33 hours.
14 hours + 0.33 hours = 14.33 hours.
Now, divide the distance traveled (140 km) by the time taken (14.33 hours):
Average speed = 140 km ÷ 14.33 hours.
Calculating this division, we get:
Average speed = 9.75 km/h.
Therefore, the average speed Juma traveled was approximately 9.75 km/h.