Arithmetic Ability
Time and Work

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Q.

(x-2) men can do a piece of work in x days and (x+7) men can do 75% of the same work in (x-10)days. Then in how many days can (x+10) men finish the work?

View Answer

Correct choice: B

Explanation:

3/4×(x−2)x=(x+7)(x−10) ⇒x2−6x−280 =0 => x= 20 and x=-14 so, the acceptable values is x=20 Therefore, Total work =(x-2)x = 18 x 20 =360 unit Now 360 = 30 x k => k=12 days
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