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by divya23 » Sun Jun 19, 2011 2:03 am
h and k are 2 machines and dey do 100 acres of work together.
h work rate is 40 acres in 8 hours
h and k do the remaining work in 5 hours
then k harvested how many acres of wheat per hour

ans = 7
i got the answer right but please tell me the step by step process...
i have done it using short forms....
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by amit2k9 » Sun Jun 19, 2011 3:25 am
100 acres = 40 acres by h + 60 acres by h+k

h' rate = 40/8= 5acres/hr

h+r = 60/5 = 12 acres/hr

r= 12-5= 7acres/hr
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by divya23 » Sun Jun 19, 2011 3:26 am
hi i also did the same but can u exlplain d steps
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by amit2k9 » Sun Jun 19, 2011 3:57 am
100 in total = 40 acres by h first + 60 acres by h+k afterwards

now we know, h does 40 acres in 8 hrs.Means per hour h does -

h' rate = 40/8= 5 acres/hr

also, h+k does 60 acres in 5 hrs means per hour they do =
h+r = 60/5 = 12 acres/hr

h+r = 12 acres per hour. out of which in 1 hr h does 5 acres. Thus r will do -
r= 12-5= 7acres/hr

I hope this helps.
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