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 50ft2 traveling at 7mph experiences a drag force of 98n . find the wet surface area of a boat traveling 7.5mph and experiencing a drag force of 135n .

Variation can be direct, inverse or joint.

The wet surface area is 60 square feet

The variation is given as:

Express as an equation

Make k the subject.

Rewrite as:

Where:

So, we have:

Make A2 the subject

Hence, the wet surface area is 60 square feet

Read more about variation at:

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the answer is 150.6

step-by-step explanation:

you multiply .02 by 30 and get .6.

and then you multiply 5.00 by 30 and get 150.

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