How could water be collected from the rooftops of the buildings ...

[Pea0909berry]

How could water be collected from the rooftops of the buildings in the
  main campus area? What will be an ideal response?

Question 2

Following the directions below, calculate how much water could be
  collected from the rooftops of the buildings on campus if the storm
  produced . cm ( in) of rain. What will be an ideal response?

[SomethingSomething]

Answer to Question 1

Gutters, cisterns, storage tanks

Answer to Question 2

a. Convert centimeters to meters of rain ( cm =  m).
2.5 cm  100 cm/m = 0.025 m
b. Calculate the volume of rain on the rooftops, in cubic meters. (Hint:Volume
= area of rooftops m calculated in question   depth of
water m calculated in question a.)
1,300,000 m2 x 0.025 m = 32,500 m3
c. Convert the volume of water collected from the rooftops to gallons.
(Hint: Multiply your answer from question b by  gal/m.)
32,500 m3 x 264 gal per m3 = 8,580,000 gal

[Pea0909berry]

Great answer, keep it coming

[ktidd]

Thanks for the timely response, appreciate it