Question

A rod of iron of uniform density has a thickness such that a one-inch-long segment of it weighs 3.88 ounces. Given that there are 0.035273 ounces in a gram and 2.54 centimeters in an inch, how many grams would a 14.79 cm length of the same iron rod weigh?
a.
73.30 g
b.
274.49 g
c.
640.51 g
d.
1,626.89 g

Answer 1

Length in inches = 14.79 / 2.54 = 5.8228346457 in.
Weight in ounces = 5.8228346457 × 3.88 = 22.5925984252 oz.
Convert to grams: 22.5925984252 / 0.035273 ≈ 640.51 g.

Answer: c. 640.51 g