Answer:
r = 1.7389 in
Step-by-step explanation:
(A) Volume of hollow block = 540 in^3
(B) volume of block without Hollows = b×d×h
= 6 ×16 ×8
= 768 in^3
(C) volume of 3 hollows = 3 ×( pi ×r^2 h)
= 3 ×( pi ×r^2 ×8)
= 24 ×pi ×r^2
solve,
A = B - C
540 = 768- (24 ×pi ×r^2)
r^2 = (768- 540) / 24 pi
r = root(3.023943919)
r = 1.7389 in
