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A machine can manufacture 20 cans per hour, and exactly 10 s
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17 Aug 2018, 18:50
17 Aug 2018, 18:50
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Question Stats:
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A machine can manufacture 20 cans per hour, and exactly 10 such cans fit into every box. Maria packs cans in boxes at a constant rate of 3 boxes per hour. If the machine ran for 2 hours and was then turned off before Maria started packing the cans in boxes, how many minutes would it take Maria to pack all the cans that the machine had made?
(A) 40
(B) 45
(C) 80
(D) 160
(E) 800
_________________
(A) 40
(B) 45
(C) 80
(D) 160
(E) 800
_________________
Sandy
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Re: A machine can manufacture 20 cans per hour, and exactly 10 s
[#permalink]
18 Aug 2018, 00:19
18 Aug 2018, 00:19
1
machine manufactures at the rate of 20 cans per hr
In 2 hr machine m/f 40 cans
3 boxes = 30 cans.
There are total 40 cans to be packed
rate of maria = 30 cans per hr.
For 40 cans total time taken by maria = \(\frac{40}{30}\) hr = 80 mins
_________________
In 2 hr machine m/f 40 cans
3 boxes = 30 cans.
There are total 40 cans to be packed
rate of maria = 30 cans per hr.
For 40 cans total time taken by maria = \(\frac{40}{30}\) hr = 80 mins
_________________
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Joined: 13 Jul 2018
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Re: A machine can manufacture 20 cans per hour, and exactly 10 s
[#permalink]
18 Aug 2018, 12:05
18 Aug 2018, 12:05
We just have to calculate Maria's rate of packing one box. That's 20 minutes.
So for 4 boxes in 2 hours (40 cans), it'll take 20*4=80.
So for 4 boxes in 2 hours (40 cans), it'll take 20*4=80.
Re: A machine can manufacture 20 cans per hour, and exactly 10 s
[#permalink]
17 Oct 2020, 17:21
17 Oct 2020, 17:21
1
Total cans in 2 hours 20 * 2 = 40
10 can / 1 Box = 40 can / B box
B box = 4 box
Now, 3 box / hour
so, 60 / 3 = M / 4
M = 80
10 can / 1 Box = 40 can / B box
B box = 4 box
Now, 3 box / hour
so, 60 / 3 = M / 4
M = 80
Re: A machine can manufacture 20 cans per hour, and exactly 10 s
[#permalink]
20 Oct 2020, 07:42
20 Oct 2020, 07:42
1
Total can manufactured 20 X 2 equal 40
Total box 40/10 equal 4
Time required 1/3 * 4*60 equal 80 min.
Total box 40/10 equal 4
Time required 1/3 * 4*60 equal 80 min.
Re: A machine can manufacture 20 cans per hour, and exactly 10 s
[#permalink]
05 Dec 2021, 02:33
05 Dec 2021, 02:33
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