You need to make a concrete base that weighs 10000 kg. The concrete weighs 2000kg per cubic metres. How many cubic metres will you need?
My answer 5.
The base cannot be higher than 40 centimeters. What will the length be??
a. 6.25
b. 0.0625
c 1.25
d. none above
Please explain your answer here. I am not understanding...
2007-09-12 10:56:03 · 3 answers · asked by kitten 3 in Science & Mathematics ➔ Engineering
You can't answer the length unless you know the width.
2007-09-12 11:02:56 · answer #1 · answered by Anonymous · 1⤊ 0⤋
You have 5 cubic meters of concrete. That is a block that will measure some length, width, and height. The height is 0.4 meters (40 cm), and since no other information about the shape of the base is given you could assume it to be square.
5 = 0.4 * length^2
12.5 = length^2 = 3.53 which is none-of-the-above
.
2007-09-12 11:06:37 · answer #2 · answered by tlbs101 7 · 0⤊ 0⤋
I choose A:6.25
but my precondition is that the width is 1 metre.
2007-09-12 14:05:03 · answer #3 · answered by Sissi L 1 · 0⤊ 0⤋