D is directly proprotional to the cube of L
D=20 when L=150
When D is 15 what is L?
Is the answer the cube root of 2531252.5312(recurring), or is that too far fetched?
+130536 We need to find the proportionality constant, (k), here.......we have
D = kL3 and we know that
20 = k(150)3 ..... so.......
k = 20 /(150)3
And we have
15 = (20/ 1503) L3 .....so........
L3 = [ 15 * 1503 / 20 ] take the cube root of both sides
L = about 136.284
