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A shower uses 8 litres per minute.
A bath uses 78 litres of water in total.

a) How many litres of water should Olivia save by having a 7 minute shower instead of a bath?
b) How long would the shower have to be on for so that it uses the same amount of water as the bath?
Give your answer in minutes and seconds.

Sagot :

Answer:

a) 22 liters of water would be saved

b) The shower would have to be on for 9 minutes and 45 seconds.

Step-by-step explanation:

a) A bath uses 78 liters. To find out how many liters a shower uses in 7 minutes, multiply 8 by 7. Then, subtract that product (which is 56) from 78, which gives you 22 liters.

b) Divide 78 liters by 8, since a shower uses 8 liters per minute. This gives you 9 minutes and 3/4 of a minute, which converts to 9 minutes and 45 seconds. (there are 60 seconds in a minute, and 3/4 of 60 is 45)

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