-0.25 don’t know but I try
It’s multiplying by 4.
1x4=4
4x4=16
16x4=64
V = s³
v = (1.2s)³
v = 1.728s³
1.728 * 100% = 172.8% increase
Surface are of a rectangular prism = 2(l x w + l x h + w x h) = 2(10 x 3 + 10x + 3x) = 2(30 + 13x) = 60 + 26x
Volume of a rectangular prism = l x w x h = 10 * 3 * x = 30x
Since surface area = volume
60 + 26x = 30x
4x = 60
x = 15 in
