Answer:
d=8
Step-by-step explanation:
Total amount borrowed by college student = $ 2,000
Total interest paid = $123.75
Total amount the student has to pay = $2,000 + $123.75
= $2123.75
Total duration for which the amount is borrowed = 9 months
Total amount he has to pay back in 1 month = 
= $235.9
Therefore, Amount he has to pay in 1 month = $235.9
the volume of cylinder is 3.14 r^2×h
2+2=2x+2
-2 to both sides
2=2x
Divide 2
X=1