The cost of a square concrete slab is proportional to its thickness and also proportional to the square of its length. What is the cost of a square slab that is 3 meters long and 0.1 meters thick?
(1) The cost of a square slab 2 meters long and 0.2 m thick is $160 more than the cost of a square slab 2 meters long and 0.1 meters thick.
(2)The cost of a square slab 2 meters long and 0.2 meters thick is $160 more than the cost of a square slab that is 2 meters long, 0.1 meters thick.
Edit: corrected
(1) The cost of a square slab 2 meters long and 0.2 m thick is $160 more than the cost of a square slab 2 meters long and 0.1 meters thick.
(2)The cost of a square slab 2 meters long and 0.2 meters thick is $160 more than the cost of a square slab that is 2 meters long, 0.1 meters thick.
Edit: corrected
Last edited by Woozler on Wed Dec 08, 2010 3:21 pm, edited 1 time in total.
