Question

The drag force 

F

 on a boat varies jointly with the wet surface area 

A

 of the boat and the square of the speed 

s

 of the boat. A boat with a wet surface area of 

83ft2

 traveling at 

20mph

 experiences a drag force of 

996N

. Find the drag force of a boat having a wet surface area of 

125ft2

 and traveling 

18mph

.

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