Answer:
6 1/4 hours
Explanation:
For Mandy,
On Thursday at the climbing gym ,she spent = 2 1/2 hours rock climbing
= 5/2 hours rock climbing
On Saturday, she went to Castle Rock State Park and climbed for 1 1/2 times as long
= 3/2 times as long as she did at the climbing gym
= 3/2 × (5/2 hours)
= 15/4 hours
The time she spent rock climbing in all is calculated as:
= 5/2 hours + 15/4 hours
Find L.C.M = 4
= (2×5) + (15 × 1)/ 4
= 10 + 15/4
= 25/4 hours
= 6 1/4 hours.
Therefore, she spent 6 1/4 hours rock climbing.