Please help me T^T is this problem?

Question

1
A swimming pool that is 3.05 m wide by 6.10 m long has an average depth of 2.75 m. The density of water is 1.00 g/cm^3. What is the mass of water in the pool when it is filled?
2
One barrel of crude oil weigh 0.136 metric tonnes . A metric tonne is exactly 1000kg. A barrel has a volume equal to 158.98 L. What is the density of crude oil in g/ ml?
3
The density of coconut oil is 57.7 puonds/ft^3. What is the value in g/cm^3? The fallowing relation are exact; 1 ft =12 in = 2.54 cm, 1 pound = 453.6 g.

Answer 1

1. 305*610*275*1=51,163,750 g
2. it is 136 kg/158.98 L = 136,000 g/ 158,980 mL = 0.85545 g/mL
3. 57.7*453.6/(12*2.54)^3 = 0.92428 g/cm^3

Answer 2

(Looks like this week's hot topic for homework is density .....)

1. Mass = volume * density and volume = length * width * depth But don't forget to put everything into the same units before you do your calculation.

2. Density = mass / volume. Hint: To get the density in g/ml, you will need to divide a mass in g. by a volume in ml.

3. 1 ft3 of coconut oil weighs 57.7lb. First convert the mass and find out how many grams 1 ft3 of coconut oil weighs.
Then work out how many cm3 are in 1 ft3, and divide by that to find how much 1cm3 of coconut oil weighs.