Answer:
v = 0.416 m/s
Step-by-step explanation:
Give that,
Distance covered by a train, d = 50 m
Time taken, t = 120 s
We need to find the speed of a train. The formula for speed of an object is equal to the total distance covered divided by total time taken. It can be given by :

So, the speed of a train is 0.416 m/s.
 
        
             
        
        
        
Answer:
2.2
Step-by-step explanation:
 
        
             
        
        
        
Answer:
   54 -3n²
Step-by-step explanation:
The square of a number (n) is represented by n². Three times that value is represented by 3n².
The relation "a is subtracted from b" is represented as ...
   b - a
When 3n² is subtracted from 54, the appropriate representation is ...
   54 -3n²
 
        
             
        
        
        
Answer:
1496π square meters
Step-by-step explanation:
A=2πrh+2πr²
   =2π(17)(27)+2π(17)²
   = 918π + 578π
   =1496π