2015 · Q63
Water is filled in a container in such a manner that its volume doubles every 5 minutes. If it takes 30 minutes for the container to be full, in how much time will it be one-fourth full ?
Elementary MathematicsGeometry: Lines, Angles and Triangles
- A7.5 minutes
- B15 minutes
- C20 minutes
- D17.5 minutes
Explanation
Doubling every 5 min: full at 30 min implies half at 25 min and quarter at 20 min. Hence option (c).