Question
Pipe ‘A’ takes 15 minutes to fill a tank. Pipe
‘B’ takes 30 minutes to empty the same tank. If pipe ‘B’ is opened 13 minutes after pipe ‘A’, then find the total time taken to fill the tank in this manner.Solution
Let the capacity of the tank be ‘30’ litres {LCM (15, 30)} Efficiency of pipe ‘A’ = (30/15) = 2 litres/minute Efficiency of pipe ‘B’ = (30/30) = 1 litres/minute Quantity of water filled by pipe ‘A’ in 13 minutes = 13 × 2 = 26 litres Quantity of water to be filled = 30 – 26 = 4 litres Time taken by pipe ‘A’ and ‘B’ together to fill 4 litres of water = {4/(2 – 1)} = 4 minutes Total time taken = 13 + 4 = 17 minutes
Find the missing term in the series?
31, 39, 49, 61, 75, __
In which direction point M with respect to point K?
The length and breadth of a park are 8 m and 6 m respectively. A man runs along all the four side and finally along a diagonal order. How much total dis...
Himani is standing facing south. She walks 16km straight, then turns left and walks another 13km and turns right and walks 7km. Finally turns left and ...
How far is he from his home now?
Starting from shop, Neha walks 12km towards west. He then turned right and walks 15km. Then he turned left and walks 8km to reach parlour. From there, h...
In which direction is Alok’s house with respect to Sameer’s house?
Rakesh walks 4 km to west and turns to his right and walks 6 km and turns right and walks 6 km and finally turns to his right. Which direction is he fac...
Priya walks towards west direction, after covering 12m, she turns right. She then walks 3m and then turns left. She then walks 6m and then turns left. S...
- Five poles (T, U, V, W and X) are at different directions from each other. Pole U is in north of Pole X, which is in east of Pole V. Pole T is in west of P...