Question

A ship can cover a certain distance in 10 hours at a speed of 16 nautical miles per hour. By how much should its speed be increased so that it takes only 8 hours to cover the same distance? (A nautical mile in a unit of measurement used at sea distance or sea water i.e. 1852 metres).

Answer 1

Answer:

Step-by-step explanation:

Time = 10 hours

Speed = 16 nautical miles per hour

Distance=speed×time,

Distance 16×10  

=160

Speed = Distance/Time

= 160/8

= 20

Thus the speed of 20nm/hr is required

Increase in speed = New speed - initial speed  

= 20 - 16 = 4 nautical miles per hour.

Therefore, the speed  should be increased by 4 nautical miles per hour.

Answer 2

Answer:

Step-by-step explanation:

Time = 10 hours

Speed = 16 nautical miles per hour

Distance=speed×time,

Distance 16×10

=160

Speed = Distance/Time

= 160/8

= 20

Thus the speed of 20nm/hr is required

Increase in speed = New speed - initial speed

= 20 - 16 = 4 nautical miles per hour.

Therefore, the speed should be increased by 4 nautical miles per hour.