Thirty men take 20 days to complete a job working 9 hours a day. How many hour a day should 40 men work to complete the job?
1. 8 hrs
2. 71/2 hrs
3. 7 hrs
4. 9 hrs
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11
here, days is common i.e, work is to be completed in 20 days
m1=30 ;; t1=9hr for a day
m2=40 ;; t2=? (x)hr for a day
we know that, if men are increased then time (work to be done) is decreased so that, m1*t1=m2*t2
30*9=40*t2
by solving, t2=27/4=6.75hr
m1=30 ;; t1=9hr for a day
m2=40 ;; t2=? (x)hr for a day
we know that, if men are increased then time (work to be done) is decreased so that, m1*t1=m2*t2
30*9=40*t2
by solving, t2=27/4=6.75hr
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0
Answer:
Step-by-step explanationexplanat15 days
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