1.

1). 1/42). 1/53). 4/104). 5/14

Answer»

A can COMPLETE 6/7th of the task in 12 DAYS

A can complete the entire task in 14 days

A’s rate of work is 1/14

B is 1.5 times as efficient as A

B’s rate = 1.5 × A’s rate

B’s rate = 3/2 × 1/14

B’s rate = 3/28

Work done by B in 1 day = 3/28

Work done by B in 7 days = 21/28

Work left = 1 – 21/28 = 7/28 = 1/4

∴ 1/4th PART is left INCOMPLETE



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