Problema Solution
A bottle of water weighs 9.6kg. The water inside the bottle weighs five times as much as the empty bottle. What is the mass of the bottle?
Answer provided by our tutors
let
w = the weight of the water inside the bottle
b = the weight of the empty bottle
a bottle of water weighs 9.6 kg
w + b = 9.6
the water inside the bottle weighs five times as much as the empty bottle
w = 5b
plug w = 5b into w + b = 9.6 you will get
5b + b = 9.6
by solving we find
b = 1.6 kg
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the mass of the bottle is 1.6 kg.