## Sue can clean the room in 45 minutes. Ann can clean the room in 1 hour. Sue cleaned for 15 minutes before Ann came to help her. How long did

Question

Sue can clean the room in 45 minutes. Ann can clean the room in 1 hour. Sue cleaned for 15 minutes before Ann came to help her. How long did they work together to finish cleaning? Write answer in fraction then write in decimal.

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1 week 2021-11-20T18:23:14+00:00 1 Answer 0

They will work for minute minute  together to finish the work.

Step-by-step explanation:

In 45 minutes Sue cleans the whole room

So, in 1 minute Sue does part of the total work ——-(1)

so in 15 minutes Sue does

= part of the total work ————————-(2)

So, the amount of work left, = (1 – 1/3)

= 2/3 of the total work.

In 60 minutes, Ann cleans the whole room

so,in 1 minute Ann does of the total work.

So, in 1 minute, Ann and Sue together do,

=

=  of the total work.

So, Ann and Sue together do  of the total work in 1 minute.

So, they would have done  the whole work in, minute.

So, they would do of the total work in

minute

= minute

= minute

minute