It takes one crew 6 hours to clean an auditorium after an event. If a second crew helps, it only takes 3.5 hours. How long would

Question

Fynjy0 [20]

3 years ago

15

It takes one crew 6 hours to clean an auditorium after an event. If a second crew helps, it only takes 3.5 hours. How long would

it take the second crew, working alone, to clean the auditorium?

Mathematics

2 answers:

kari74 [83] · Answer 1 · 2022-06-30T01:17:50+03:00

kari74 [83]3 years ago

6 0

Answer: 7.5 hours

Step-by-step explanation:

rate of first crew is 8 hours

jobe done by first crew in 2 hours is 2(1/8)= 2/8= 1/4

job left is 1-1/4= 3/4

rate of second crew 10 hours

time need to finish...

10(3/4)= 10(7.5)= 7.5

7 hours 30 minutes to finish

Basile [38] · Answer 2 · 2022-06-29T23:00:57+03:00

Basile [38]3 years ago

4 0

Not sure if this is a trick question but, if it is asking how long it would take the second crew without the first crew i assume 6 hours?
or maybe it is asking for how long it would take the second crew after the first crew
6-3.5
=
2.5 maybe?