Mrs Suzi drives 3 hours at an average speed 40 miles
per hr. Then she drives 2 hours at
of 35 mile per hour. What is
her average speed for the whole trip.
Answers
Answer:
distance travel in 3 hours = 40×3 =120 miles
distance travel in 2 hours = 35×2 = 70 miles
total distance travel in 5 hours = 120+70=190
average speed = 190÷5=38 miles per hour
Answer:
38 miles per hour
Explanation:
Given -
Mrs. Suzi drives,
3 hours at an average speed 40 miles per hour
2 hours at 35 miles per hour
To find -
The average speed of whole trip
Solution -
First we have to find the total distance and total time of the trip
Total time = time first trip + time second trip
= 3 hours + 2 hours
= 5 hours
Total distance = Distance of 1st trip + 2nd trip
Distance of 1st trip = time × speed
= 3 × 40 miles
= 120 miles
2nd trip = 2×35 miles
= 70 miles
Total distance = 120 miles + 70 miles
= 190 miles
Average speed = Total distance / total time
= 190 miles / 5 hours
= 190÷5 miles/hour
= 38 miles per hour
Hence average speed of whole trip = 38 miles/h
hope it helps.