Answer: 120
Step-by-step explanation:

explanation down below↓
18 inches.
This is true because 40% of 60 is 24. 75% of 24 is 18. :))
Step-by-step explanation:
Since SP=TR, the differnce of PR and ST 24-15 divided by 2 is the length of PD (4.5)
Try to understand the rest from the attached picture
Lemme think real quick...