The time taken by artisans a ,b and c to do an embotary job is 15 hours , 18 hours , and 15 hours respectively . A b and c being work together but after 3 hours b is put on another job . How long will a and c take it finished ?
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3/48=2/x
16*2
32hrs
a,c takes 32 hrs
16*2
32hrs
a,c takes 32 hrs
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