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Mathematics
OpenStudy (anonymous):

Some railroad rails weigh 155lbs/yd & are 33 ft long. How much would a 33-ft long rail weigh? thanks

OpenStudy (shadowfiend):

So first, figure out how many feet there are in a yard. Then, find how many yards a 33-foot long rail is (I believe we did something similar earlier). Finally, you know that the rail weighs 155 pounds for every yard, so you can find how many pounds 33 feet of rail are.

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