Answer:
1.88 minutes
Step-by-step explanation:
This question can be solved using speed, distance and time concept along-with use of computing fractions.
Given
Distance ran by Kirby = 3/4 of half mile
= 3/4 of 1/2 mile = 3/4 * 1/2 mile = 3/8 mile.
Speed of Kirby until she dropped out of race = 12 miles/hour
Formula to calculate time = Distance/Time
substituting value of speed of Kirby and distance covered by Kirby
Time = [tex](3/8) / 12 = 3/(8*12) = 1/32 \ hour[/tex]
Since one hour has 60 minutes 1/32 hour = (1/32) * 60 minutes = 1.88 minutes
