The catamaran speed for this trip is 
Further explanation:
The relationship between speed, distance and time can be expressed as follows,

Given:
The distance covered by the catamaran is 
The time taken to travel is 2 and one half hours.
Explanation:
Consider the speed of catamaran for this trip as 
The distance between the city A and city B is 
The time taken to travel is 2 and one half hours.
The time taken by the Cat can be expressed as follows,

The speed can be obtained as follows,

The catamaran speed for this trip is 
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Answer details:
Grade: High School
Subject: Mathematics
Chapter: Speed
Keywords: Cat, high-speed, catamaran, auto ferry, operations, city A, city B, operates, 144 miles, trip, 2 hours, one half hours, catamaran, speed, distance, time, trip, speed for trip.