You have steamed 1587 miles at 11.2 knots, and have consumed one-half of your total fuel capacity of 2840 bbls. What is the maximum speed you can steam to complete the remaining 1951 miles?
⢠Fuel consumption vs. speed relationship (fuel used is proportional to time if consumption per hour is constant) ⢠How to find time = distance ÷ speed and relate it to fuel used so far ⢠Using the fact that half the fuel was used for the first leg to budget fuel for the second leg
⢠First, compute how many hours you have already steamed on the first leg, then find your fuel consumption rate in barrels per hour using half the total fuel. ⢠Figure out how many hours you can steam with the remaining half of the fuel, then divide the remaining distance by those hours to find the required speed. ⢠Compare your computed speed with the answer choices and think about whether it should be higher or lower than your original 11.2 knots, given that you used half your fuel on the first part.
⢠Be sure you calculate the time for the first leg correctly using 1587 miles and 11.2 knots. ⢠Confirm the fuel consumption rate you derive (barrels per hour) is reasonable by checking units carefully. ⢠Double-check that the time available with remaining fuel and the speed for the remaining 1951 miles are consistent before picking the closest answer.
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