Question 1186076
The volume of water Vm^3, is directly proportional to the square  of its cross-sectional radius, R m. If the radius of the pipe is increased by 150%, find the percentage increase of the volume. 
========================
"increased by 150%" ---> 100% + 150% = 250%
r is multiplied by 2.5
V is multiplied by 2.5^2 = 6.25
An increase of 5.25 or 525%