ISEE Word Problems Question 244: Answer and Explanation
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Question: 244
8. There are 1,760 yards in a mile. If Elena is walking at a speed of 4 miles per hour, which of the following expressions gives her speed in yards per second?
- A.
- B.
- C.
- D.
Correct Answer: C
Explanation:
The answer is C
Begin by stating the speed as a fraction with the units marked: 
. Now, convert the miles into yards. As there are 1,760 yards to a mile, multiply 4 in the numerator by 1,760: 
. Now, convert the hour into seconds. As there are 60 minutes per hour and 60 seconds per minute, multiply the 1 in the denominator by 60 × 60: 
.