A submarine took 9 hours to complete a journey. For the first 5 hours, it traveled at an average speed of 106km/h. For the rest of the journey, it traveled at an average speed of 125km/h. What was the total distance of the journey?

The correct answer is 1030 km

Explanation:

The distance a body such as a submarine travels depends on two main variables the time of the movement and the speed. Indeed, to calculate the distance it is possible to use the formula d = s x t. The process to calculate the distance of the submarine journey is shown below:

Distance in the first part of the journey:

It is known during the first part of the journey the submarine traveled 5 hours at a speed of 106 km/h

Distance = speed × time

D = 106 km/h × 5 h

D = 530 km

Distance in the second part of the journey:

During the remaining 4 hours (the first part took 5 hours and the total time traveled were 9 hours) the speed was 125km/h. Now, let's calculate the distance covered during this part of the journey

Distance = speed × time

D= 125 km/h × 4 h

D= 500 km

Total distance:

Finally, add both distances to know the total distance

530 km + 500 km = 1030 km

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