Ravi is able to complete 2/5 of a certain work in 12 hrs, and Mohan is able to complete 1/3 of the same work in 10 hrs. Find : (1) how much work can Mohan do in 1 hr. (2) how much work can Ravi do in 1 hr. (3) in how much time will the work be completed, if both work together?
Answers
Answered by
1
Step-by-step explanation:
Fraction of work done by both of them together in One hour = 1/15 + 1/12
= 9/60 = 3/20
Hence, the time taken to finish the same piece of work together = 20/3 hours = 6hours + 2/3hours = 6hours & 2/3 × 60 min
= 6 hours & 40min
Answered by
0
Answer:
Ravi's 1 hour's work = 1/15 &
Raman's 1 hour's work =1/12
Both's 1 hour's work = 1/15+1/12 =9/60
let both take to do it in t hours
(9/60)t =1
t = 60/9h = 6h + (6×60)/9min
t = 6hour and 40 minute
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