A and b can separetely do a work in 15 and 20 days they worked together for 6 days and then b was replaced by c if the remaining work was completed in 4 dayss then c alone can complete the work in how many days
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Answer:120 days
Step-by-step explanation:let the work will be 60 units. Then A completes in 15 days that means he do 4 unis in 1 day. Like that B 3 units in 1 day. So working together they do 7 units for one day. For 6 days it will 42 units. So only 18 units left and b left the work. And remaining work is done by A and C in 4 days so A 4 days work is 16 units so remaing 2 units done by C. So he takes 4 days for 2 units then 120 days for 60 units.
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