how long would it take Amal to run 3 miles at that pace

Hello!
Time taken to travel 1 mile =12 minutes
Amal can run 1/8 mile in 1 1/2 minutes
distance ran by amal= 1/8 miles.
Time taken= 1/12 = 1x2+1/2 = 3/2 minutes.
We need to find how many minutes did he take to run one mile,
he travels 1/8 of a mile in 3/2 minutes.
Time taken to travel 1 mile is given by
T=3/2 x 8/1 = 12 minutes.
Time taken to travel 1 mile = 12 minutes