Problemas sobre conversión de unidades....

Problem 1
A certain Compact Disc (CD) contains 783.216 megabytes of digital information. Each
byte consists of exactly 8 bits. When played, a CD player reads the CD’s information at a
constant rate of 1.4 megabits per second. How many minutes does it take the player to read
the entire CD?
783.216MB( 10⁶byte÷1Mbyte) (8 bits÷1 byte) (1 s÷1.4×10⁶bits) (1 min÷60seg)
Problem 2
An average family of four uses roughly 1200 L (about 300 gallons) of water per day (1 L =
1000 cm3
). How much depth would a lake lose per year if it covered an area of 50 km2 with
uniform depth and supplied a local town with a population of 40,000 people? Consider only
population uses, and neglect evaporation, rain, creeks and rivers.
Problem 3
Make a rough estimate of the volume of your body (in m3
).