a works twice as fast as B and B works twice as fast as C. all the three working together can finish a task in 4 days with the help of D. if D alone can finish the same task in 16 days then in how many days will A alone finish 75% of the same work

Question

Arijit Das · Answer

21/4 for 75% work. 7 days for entire work

I'm GROOT · Answer

A will take 7 days to complete the whole work.
But to complete 75% of the work A needs only 21/4 = 5.25 days.

Bishal Borah · Answer

7 days

Rishabh Chhikara · Answer

144/7 days

a works twice as fast as B and B works twice as fast as C. all the three working together can finish a task in 4 days with the help of D. if D alone can finish the same task in 16 days then in how many days will A alone finish 75% of the same work

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