ineedhelpwhomework
24.08.2019 •
Mathematics
Anita can clean a typical pool in 8 hours. chao can clean a typical pool in 6 hours. how long should it take anita and chao working together to clean a typical pool?
can you put it in steps, so i understand it?
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Ответ:
1 pool cleaned8 hour
x1 hour
x=(1 pool cleaned * 1 hour) / 8 hour=1/8 portion cleaned.
2) we calculate the portion of pool cleaned by Chao in a hour.
1 pool cleaned6 hour
x1 hour
x=(1 pool cleaned * 1 hour) / 6 hour=1/6 portion cleaned.
3) we can suggest this equation:
x=number of hour
x(1/8+1/6)=1
(number of hour)*(portion of pool cleaned by Anita in a hour + portion of pool cleaned by Chao in a hour)=1 pool cleaned.
4) we solve this equation:
x(1/8 + 1/6 )=1
1/8+1/6=(3+4)/24=7/24
least common multiple (8,6)=24
x(7/24)=1
x=(1*24)/7
x=24/7≈3.43 (3 hours, 25 minutes, 43 seconds)
together they cleaned the pool in 3 hours, 25 minutes and 43 seconds.
Ответ:
5 weeks!
Step-by-step explanation:
You have to divide them, and to double check just multiply 40.50 and 5