Bob's shower uses 18 gallons of water every 3 minutes. How many gallons of water does Bob use if he takes a 13 minute shower?

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Answer 1 · 2018-06-01T11:16:06

#78# gallons of water

Given that Bob's shower uses #18# gallons of water every #3# minute,

Hence,
#3# minutes #-># #18# gallons

#1# minutes #-> ? # gallons

#:.# In #1# minute #(18/3)# gallons of water would be used.

#(18/3) = 6#

#:. 6# gallons of water per minute is used by Bob's shower.

So, how much water would be used in #13# minutes,

#1# minute #-># #6# gallons

#:.13# minutes #-># #(6# x #13)#

#(6# x #13) = 78#

Hence, #78# gallons of water would be used by Bob while using his shower.