A well with 7 m inside diameter is dug 22.5 m deep and the earth taken out of it has been spread around it to a width of 10.5 m to form an embankment. Find the height of the embankment so formed .

A

1.6 m

B

1.5 m

C

1.3 m

D

1.4 m

E

1.8 m