CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

A cistern can be filled by a faucet in 40 minutes and by another faucet in 120 minutes. Both faucets are kept open for 20 minutes and then the first faucet is shut off. After this, the cistern will be completely filled in?


  1. 30 min

  2. 40 min

  3. 70 min

  4. 90 min

  5. 60 min


Solution

The correct option is B

40 min


For 20 minutes = 20(140+1120)=23

Remaining part = 123=13

The cistern will be completely filled in (2nd only, after 20 minutes) = 13 × 120 = 40 minutes

flag
 Suggest corrections
thumbs-up
 
0 Upvotes


Similar questions
View More


People also searched for
View More



footer-image