A security system records video footage. One minute of video requires 180 MegaBytes of storage. The recording system can store several hours of video footage. How much storage would be needed for 2 hours of video footage ? (1k = 1024):
1
19.2 Giga Bytes
2
20.3 Giga Bytes
3
21.1 Giga Bytes
4
22.4 Giga Bytes