a b c can clear a debir is 3 hours and a can clear it in 8 hours and how much will b take to clear it
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b = 1/3 - 1/8
= 8 - 3
---------
3 × 8
= 5/24
= 24/5 hours
= 8 - 3
---------
3 × 8
= 5/24
= 24/5 hours
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