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If 600 men dig a 5.5m wide, 4m deep and 405m long canal in h

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If 600 men dig a 5.5m wide, 4m deep and 405m long canal in h  [#permalink]

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New post 14 Oct 2019, 12:52
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75% (02:25) correct 25% (01:46) wrong based on 4 sessions

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1)If 600 men dig a 5.5m wide, 4m deep and 405m long canal in half an hour, then how long a canal will 2500 men, working for 6 hours, dig if it is 10m wide and 8m deep?

a) 2694*1/3m
b) 4082m
c) 5568*3/4m
d) 6452m

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Re: If 600 men dig a 5.5m wide, 4m deep and 405m long canal in h  [#permalink]

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New post 14 Oct 2019, 13:21
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5.5× 4×405--->600× 1/2
10×8×X---->2500×6
X=2500×6×5.5 ×4×405/24000=
5568*3/4

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Re: If 600 men dig a 5.5m wide, 4m deep and 405m long canal in h  [#permalink]

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New post 14 Oct 2019, 14:17
Hi,
Thanks for your answer but can you plz explain a lot more for better understanding?

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Re: If 600 men dig a 5.5m wide, 4m deep and 405m long canal in h   [#permalink] 14 Oct 2019, 14:17
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If 600 men dig a 5.5m wide, 4m deep and 405m long canal in h

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