OAR OAR Math Skills: Word Problems 3

Question 1

An aircraft carrier travels at 28 knots for 4 hours, then at 18 knots for 3 hours. What is the total distance covered in nautical miles?

Accepted Answer

166 nm

Answer

148 nm

Answer

158 nm

Answer

178 nm

Question 2

A training course costs $4,500. The Navy covers 80% and the officer pays the rest in 6 equal monthly installments. How much is each installment?

Accepted Answer

$150

Answer

$100

Answer

$120

Answer

$180

Question 3

A pump drains a 12,000-gallon tank at 250 gallons per minute. A second pump draining 150 gallons per minute starts 10 minutes after the first. How many total minutes from start until the tank is empty?

Accepted Answer

34 minutes

Answer

30 minutes

Answer

32 minutes

Answer

36 minutes

Question 4

A jet uses 1,800 lb of fuel per hour cruising and 2,400 lb per hour climbing. A mission has 20 minutes of climb and 2 hours of cruise. How many pounds of fuel are used?

Accepted Answer

4,400 lb

Answer

3,800 lb

Answer

4,000 lb

Answer

4,800 lb

Question 5

If 5 technicians can service 15 aircraft in 3 days, how many technicians are needed to service 36 aircraft in 4 days?

Accepted Answer

9

Answer

6

Answer

8

Answer

10

Question 6

A navigational chart uses a scale of 1 inch = 15 nautical miles. Two ports measure 6.4 inches apart. If a ship travels between them at 24 knots, how long does the trip take?

Accepted Answer

4 hours

Answer

3 hours

Answer

3 hours 30 minutes

Answer

4 hours 30 minutes

Question 7

Two communications specialists can encode 45 and 30 messages per hour respectively. Working together, how long will it take them to encode 225 messages?

Accepted Answer

3 hours

Answer

2 hours

Answer

2 hours 30 minutes

Answer

3 hours 30 minutes