Friday
March 24, 2017

Post a New Question

Posted by on Sunday, September 25, 2011 at 5:35pm.

A slice of thickness 1 cm is cut off from one side of a cube. If the volume of the remaining figure is 180 cubic centimeter, how ling is the edge of the original cube

  • Algebra & Trigonometry - , Tuesday, September 27, 2011 at 5:35am

    If the original cube had side s, then the volume was s^3.

    A 1-inch slab has volume s^2.

    So, we know that s^3 - s^2 = 180
    s^3 - s^2 - 180 = 0
    Inspection reveals that s=6 is one answer. So, now we have

    (s-6)(s^2 + 5s + 30)

    The quadratic has no real roots, so s=6 is the only answer.

Answer This Question

First Name:
School Subject:
Answer:

Related Questions

More Related Questions

Post a New Question