Answer:
6m/s²
Step-by-step explanation:
Given parameters: 
Initial velocity = 35m/s 
Final velocity = 65m/s 
Time taken = 5s 
Unknown: 
Acceleration = ? 
Solution: 
Acceleration is the rate of change of velocity with time taken; 
 Acceleration = 
 
 
 So; 
 Acceleration = 
 = 6m/s²
 = 6m/s²