Answer:
I suppose it has 4 digits.
Step-by-step explanation:
The fractional equivalent of the repeating decimal would be 15/99.
The height h = 12.87 cm.
Volume = pi r^2 h
647 = pi 4^2 h
h = 647 / 16pi
h = 12.87 cm.
3| 42 , 63 , 84
7| 14 , 21 , 28
1| 2 , 3 , 4
2 × 3 × 4 × 7 × 3 = 504