Question
Pipe A and B can fill the pool in 35 minutes and 10
minutes, respectively. Pipe C can empty half filled pool in 35 minutes. If all the pipes are opened together, then find the time taken to fill the empty pool completelySolution
Time taken by pipe C to empty the full pool = 35 × 2 = 70 minutes Let the capacity of pool = 70 units Number of units of water filled by pipe A alone in one minute = 70/35 = 2 units Number of units of water filled by pipe B alone in one minute = 70/10 = 7 units Number of units of water emptied by pipe C alone in one minute = 70/70 = 1 units Required time taken = 70/(2 + 7 – 1) = 8.75 minutes
The vector of malaria is :
A photon of energy 3 eV collides with a metal having a work function of 2 eV. Kinetic energy of the emitted electron is:
Which disease is caused by Plasmodium parasite?
Which of the following gas usually causes explosions in coal-mines?
Necessary element of change in solar energy to electric energy –
The Doppler Effect occurs in:
Eclipses occur due to which optical phenomena?
Which vitamin helps in improving night vision?
The red colour of onion is caused by the presence of which pigment?
Which of the following is the correct term used to describe Graphite, Carbon and Diamonds?
