To find the time it takes to complete a task at a constant rate, you should perform which operation?

Divide the total amount by the rate.

Multiply the total amount by the rate.

Add the rate to the total amount.

Subtract the rate from the total amount.

Rate Problems with a Given Total Practice — Grade 4 math

Lesson 60: Rate Problems with a Given Total — Practice Questions

1. A water pump fills a tank at a rate of 25 gallons per minute. If the tank has a capacity of 500 gallons, it will take ___ minutes to fill the tank completely.
2. Which of the following expressions is equivalent to $5^{-2}$?
- A. $\frac{1}{25}$
- B. -25
- C. -10
- D. $\frac{1}{10}$
3. A writer plans to write a 90,000-word novel by writing 3,000 words per day. How many days will it take the writer to finish the novel?
- A. 30 days
- B. 270,000,000 days
- C. 87,000 days
- D. 300 days
4. What is the simplified value of the expression $2^{-5}$?
- A. $\frac{1}{32}$
- B. -10
- C. -32
- D. $\frac{1}{16}$
5. To find the time it takes to complete a task at a constant rate, you should perform which operation?
- A. Divide the total amount by the rate.
- B. Multiply the total amount by the rate.
- C. Add the rate to the total amount.
- D. Subtract the rate from the total amount.
6. A car travels 240 miles in 4 hours. What is the car's average speed in miles per hour? ___ miles per hour
7. A factory produces 400 toys in 8 hours. Which expression correctly calculates the production rate in toys per hour?
- A. 400 + 8
- B. 400 × 8
- C. 400 ÷ 8
- D. 8 ÷ 400
8. If a printer can print at a rate of 25 pages per minute, how many minutes will it take to print a 200-page document? ___ minutes
9. Maria read a 165-page book in 3 days, reading the same number of pages each day. What was her reading rate in pages per day? ___ pages per day
10. To find the time it takes to complete a task, you should divide the total amount by the rate. Is this statement true or false?
- A. True
- B. False