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Marrrta [24]
3 years ago
8

John can clear a lot in 1.5 hours. His partner can do the same job in 4.5 hours. How long will it take them to clear the lot wor

king together?
Mathematics
1 answer:
Arisa [49]3 years ago
8 0

Answer:

1.125 h = 1h 7.5 min = 1 h 7 min 30 sec

Step-by-step explanation:

John makes 1/1.5 work per h.

His partner makes 1/4.5 work per h.

Together they make (1/1.5 + 1/4.5) = (3/4.5 + 1/4.5) = 4/4.5 work per h.

They will work

1 : 4/4.5 = 4.5/4 = 1.125 h = 1 h + 0.125 h = 1h + 0.125h*60min/1h =

=1h 7.5 min = 1 h 7 min 30 sec

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sp2606 [1]

Answer:  The answer is \textup{M}+\textup{H}\leq 10~~\textup{and}4\textup{M}+7\textup{H}\leq 90.


Step-by-step explanation: Given that a school wants to put on a dance recital. The programs of Middle school dancer will be short of 4 minutes each and programmes of High school performers will be long of 7 minutes each.

Number of middle school dances is "M" and number od high school dances is "H".

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