One way to determine the speed of the current of a river is to measure how long it takes a leaf to pass under a bridge. For example, let's say it takes a leaf 7 seconds to pass under a bridge that is 30 feet wide. What is the speed of the current in feet per hour? Round to the nearest integer.
A) 12,857 feet per hour
B) 2571 feet per hour
C) 2 feet per hour
D) 514 feet per hour
E) 15,429 feet per hour

Question

One way to determine the speed of the current of a river is to measure how long it takes a leaf to pass under a bridge. For example, let's say it takes a leaf 7 seconds to pass under a bridge that is 30 feet wide. What is the speed of the current in feet per hour? Round to the nearest integer. ​
A) 12,857 feet per hour
B) 2571 feet per hour
C) 2 feet per hour
D) 514 feet per hour
E) 15,429 feet per hour

Quizplus · Accepted Answer

The Answer is E

One Way to Determine the Speed of the Current of a River