Question

ANSWERS PLEASEEEE

Three runners are jogging from North Augusta to Beech Island. Runner 1 runs 14 miles in 3 hours while Runner 2 runs 16 miles in 4 hours. Runner 3 runs 15 miles in 6 hours. What is the average speed of each runner? Then, get the average speed of all the runners together (total distance/total time)

Answer 1

Step-by-step explanation:

Given that,

Runner 1 runs 14 miles in 3 hours. His average speed is given by :

`v_1=(14\ miles)/(3\ h)=4.67\ mph`

Runner 2 runs 16 miles in 4 hours. His average speed is given by :

`v_2=(16\ miles)/(4\ h)=4\ mph`

Runner 3 runs 15 miles in 6 hours. His average speed is given by :

`v_3=(15\ miles)/(6\ h)=2.5\ mph`

Total distance covered by all three runners, D = 14 + 16 +15 = 45 miles

Total time taken, t = 3 + 4 + 6 = 13 hours

The average speed of all the runners together is given by :

`V=(45\ miles)/(13\ h)\\\\V=3.46\ mph`

Hence, this is the required solution.