Randhir is 1 1/2 times faster than sudhir . If Randhir can complete a piece of work in 20 Days , how long will it take for both Randhir and Sudhir to complete the same piece of wrok ?
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Randhir can complete a piece of work in 20 Days
His rate of work per day = 1/20
Randhir is 1 1/2 times faster than Sudhir
Sudhir's = (1/20)/(1 1/2) = 1/30 per day
Their combined rate = 1/20 + 1/30
= 1/12 per day
Both Randhir and Sudhir working together will take:
1/ (1/12) = 12 days
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Answer:
Step-by-step explanation:
Randhir can complete a piece of work in 20 Days
His rate of work per day = 1/20
Randhir is 1 1/2 times faster than Sudhir
Sudhir's = (1/20)/(1 1/2) = 1/30 per day
Their combined rate = 1/20 + 1/30
= 1/12 per day
Both Randhir and Sudhir working together will take:
1/ (1/12) = 12 days
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