A and B takes 6 hours and 9 hours respectively to complete a work .A works for 1 hour and then B works for 2 hours. find :::
how much work is done in these 3 hours.
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A takes 6 hours to complete a work
A in 1 hour does 1/6 part of work
B takes 9 hours to complete the same work
B in 1 hour does 1/9 part of work.
HOPE THE QUESTION IS A WORKS FOR 1st HOUR(alone) and B WORKS FOR NEXT 2 HOURS(alone)
A work for 1 hour==1/6 part of work completed
B work for 2 hours== 2*1/9 =2/9 part of work completed.
So, in 3 hours== 1/6 + 2/9 = 3+4/18 = 7/18 work is completed.
7/18 work is completed in 3 hours (with A working alone for 1 hour and B working alone for next 2 hours)
Hope it helps.
A in 1 hour does 1/6 part of work
B takes 9 hours to complete the same work
B in 1 hour does 1/9 part of work.
HOPE THE QUESTION IS A WORKS FOR 1st HOUR(alone) and B WORKS FOR NEXT 2 HOURS(alone)
A work for 1 hour==1/6 part of work completed
B work for 2 hours== 2*1/9 =2/9 part of work completed.
So, in 3 hours== 1/6 + 2/9 = 3+4/18 = 7/18 work is completed.
7/18 work is completed in 3 hours (with A working alone for 1 hour and B working alone for next 2 hours)
Hope it helps.
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