Iron is sold in sheets that are 2.0 cm thick and 120.0 cm wide. You want to buy
a sheet of iron with a mass of 50,000.0 g. What must be the length of the
sheet of iron?

Question

Iron is sold in sheets that are 2.0 cm thick and 120.0 cm wide. You want to buy
a sheet of iron with a mass of 50,000.0 g. What must be the length of the
sheet of iron?

sleepyhead314 · Answer

hmm
are you told any more information?
like the weight of the 2.0cm by 120.0 cm sheet?

sleepyhead314 · Answer

http://www.answers.com/Q/What_is_the_weight_of_1_cubic_meter_of_iron 1 m^3 => 7,874 kg we should use this ratio to find your answer

sleepyhead314 · Answer

1 m^3 = 1000000 cm^3

sleepyhead314 · Answer

7874 kg = 7874000 g

sleepyhead314 · Answer

this ratio simplifies to
500 cm^3 = 3937 g of iron

sleepyhead314 · Answer

volume of the sheet would be
2 * 120 * x = 240*x cm^3

sleepyhead314 · Answer

we can match ratio to ratio to find "x"

 240*x      50000
--------- = ----------
  500         3937

sleepyhead314 · Answer

http://www.wolframalpha.com/input/?i=240x%2F500+%3D+50000%2F3937 scroll down to "solution" and click "approximate form"