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love history [14]
3 years ago
14

It takes you 45 minutes to clean the fish tank and it takes your sister 30 minutes. how long does it take the two of you working

together to clean the fish tank
Mathematics
1 answer:
katen-ka-za [31]3 years ago
5 0

It takes you 45 minutes to clean the fish tank and it takes your sister 30 minutes. how long does it take the two of you working together to clean the fish tank

Answer:

My 1 minute work =\frac{1}{45}

My sisters 1 minute work =\frac{1}{30}

My and My sister's 1 minute work =\frac{1}{45}+\frac{1}{30}

                                                        =\frac{5}{90}

                                                        =\frac{1}{18}

\therefore Me and My sister will finish the work in \frac{18}{1} =18 minutes

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