Betsy can clean a/b of the house in an hour. How long will it take her to clean the whole house?

Question

asked Jul 17, 2020 135k views

1 Answer

Henryk Borzymowski · Answer 1 · 2020-07-23T11:21:34+0000

Answer:

$b/a\ hours$

Explanation:

we know that

Betsy can clean a/b of the house in an hour

The whole house (100%) correspond to the number 1

so

using proportion

Find out how long will it take her to clean the whole house

$((a/b))/(1)=(1)/(x) \\ \\x=1/(a/b)\\ \\x=b/a\ hours$