40:28 is equivalent to 10:7
B. The solution is 7
C. There equation has infinitely many solutions
D. There equation has no solution
P.S. There no equation to show you guys sorry.... :(
P=14,400
R= 7 1/2 7.5
T=4
I= 14,400 x 0.075.x 4
I= 4,200