The pressure exerted by a certain liquid at a given point varies directly as the depth of the point beneath the surface of the liquid. The pressure at 60feet is 180 per pounds square inch. What is the pressure at 20 feet

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Verified answerHi,

P = kd where P = pressure, d = depth, and k = proportionality constant

180 = k(60)

3 = k so the equation is y = 3x.

When x is 20 feet, then y = 3(20) = 60

The pressure was 60 pounds per square inch. <==ANSWER

I hope that helps!! :-)

the pressure at 20 feet should be 60 pounds per square inch

u set it up as a proportion and cross multiply then divide:

60/180=20/x, x=60 per lb square inch

You need to multiply the cross-sectional area of a regular hexagon (with a side of 3 inches) by the length of the prism to get its volume, and then multiply by density to get the weight. Don't forget to divide by 12 in converting inches to feet.

A regular hexagon can be decomposed into six equilateral triangles, each of which can be split into a pair of 30-60-90 right triangles. Divide and conquer!

does this help?? Sorry if it doesnt make sense

If you've had physics, you'd know it's a linear relationship:

60 ft/180 lb per in2 = 20 ft/ x lb per in2

solve for x.

If it varies directly it means that

preasure = x(depth)

NOT: x(depth)^2

so if it is 180psi @ 60ft

then it would be 180*20/60 at 20 feet = 60psi

60psi? 1/3 the depth = 1/3 the pressure. unless it changes exponentially

wouldn't it be a proportional thing??

like if at 60ft it's 180 lbs. per square inch.

then at 20ft wouldn't it be 60 lbs. per square inch??

sorry for answering a question with a question,

i just wanted to share my thoughts and see if it helped.=].

60 per pounds sq inch

well obviously its 60 pounds if this is a see who is smarter question...