1. A car traveled 281 miles in 4 hours 41 minutes. What was the average speed of the car in miles per hour?
2. In a group of 120 people, 90 have an age of more 30 years, and the others have an age of less than 20 years. If a person is selected at random from this group, what is the probability the person's age is less than 20?
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Answer:
1.) Average Speed = Total Distance/ Total Time
Total distance = 281 miles
Total Time = 4 hours and 41 min
we will convert the minute in hours = 41/60 = 0.683 hour
So total time will be = 4 + 0.683 = 4.683 hours
Average speed = 281/4.683 = 60.004 Miles/hour.
1 Mile / Hour = 1.60934 Km / Hour.
60.004 Miles / hour = 96.567 Km / hour
2.) simple way 120 people = total ; 90 people =average 30 years it means 90/120 =3/4 …. others 4/4 -3/4 = 1/4 it means means %25 it means 25/100 = 0.25 very clear
Step-by-step explanation:
Answer:
Calculated:
1. 60 miles per hour
2. 0.25
Heart and Rate :)
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