Answer:
1. 9.8 x 10^-7 cm/s
2. 50970 L
Explanation:
1.
time, t = 30 days = 30 x 24 x 60 x 60 seconds = 2592000 seconds
length of hair, d = 1 inch = 2.54 cm
rate of growth = length of hair grows per second = 2.54 / 2592000
= 9.8 x 10^-7 cm/s
Thus, the grown rate of hair is 9.8 x 10^-7 cm/s.
2. length of the pool, l = 15 feet
width of the pool, w = 15 feet
height of pool, h = 8 feet
Volume of the pool, V = length x width x height
V = 15 x 15 x 8 = 1800 ft^3
To convert ft^3 into m^3 , we use
1 ft = 0.3048 m
so, 1 ft^3 = (0.3048)^3 m^3 = 0.0283 m^3
So, 1800 ft^3 = 1800 x 0.0283 = 50.97 m^3
now, 1 m^3 = 1000 L
So, 50.97 m^3 = 50.97 x 1000 L = 50970 L
