Answer:

1. 334 m/s

2. 337 m/s

3. 340 m/s

Explanation:

1. 331 + (0.6) 5

      331+3

       =334 m/s

2. 331 + (0.6) 10

       331 + 6

      =337 m/s

3. 331 + (0.6) 15

         331 + 9

      =340 m/s