J) 2 .0 32. A and B working separat...
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J) 2 .0 32. A and B working separately can do a piece of work in 9 days and 15 days, respectively. If they work for a day alternately, with A beginning, the work will be completed in (2) 11 days (3) 9 days (4) 12 days (1) 10 days

11th - 12th Class
Maths
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32. (2)( (A+B)^{prime} s ) first 2 days work ( =frac{1}{9}+frac{1}{15}=frac{5+3}{45}=frac{8}{45} ) ( (A+B)^{prime} ) s 10 days work ( =frac{8 times 5}{45}=frac{40}{45} ) Remaining work ( =1-frac{40}{45}=frac{1}{9} ) So, the work will be completed by [ =10+1=11 text { days } ]
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