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ICSE Class 8 Answered

90 men can complete a work in 24 days working 8 hours a day.How many men are required to complete the same work in 18 days working 7 1/2 hours (the number is mixed numdber)) a day? 
Asked by aratisaha89 | 17 Feb, 2019, 09:47: PM
answered-by-expert Expert Answer
90 men complete the work in 24 days if they work 8 hrs/day
 
total work hours for 90 men  = 24×8 = 192 hours
 
number of man-hours to complete the work = 90×192
 
if work has to be completed in 18 days with begin mathsize 12px style 7 1 half end style working hours, total work hours 18×begin mathsize 12px style 7 1 half end style = 15×9 = 135 hours
required number of workers = (90×192) / 135  =  128
Answered by Thiyagarajan K | 17 Feb, 2019, 11:07: PM
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