A and B take 6 hours and 9 hours respectively to complete a work. A works for 1 hour and then B works for two hours. How much work is done in these 3 hours? How much work is still left ?
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Answer:
11/18
Step-by-step explanation:
As work done in 1hr is 1/6
Bs work done in 1hr is 1/9
in 2 hrs work done is 2/9
in 3hrs work done is 1/6+2/9 = 3+4 /18=7/18
remaining work left is 1-(7/18) = 11/18
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