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A can do 3 piece of work in 4 hours, B and C together in 3 hours , and A and C together in 2 hours. How long will B alone take to do it?

Created: 5 years ago | Updated: 10 months ago

Updated: 10 months ago

8 hours

12 hours

s10hours

24 hours

Pubali Bank Ltd জুনিয়র অফিসার ০১. ০৩. ২০১৯ গণিত

ব্যাখ্যা

315

Best Ans:

A,B and C together need = (3×4)/(3 + 4) = 12/7 hours

And C need 2 hours

∴B need = {(12/7)×2}/{2 - (12/7)} hours

= (24/7)/{(14 - 12)/7}

= 24/2 hours

= 12 hours

5 years ago

1 1

Md Azizur Rahman

Founder of Satt

গণিত

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