Let the number of books on History, Polity and Geography be x, y and z respectively. Given, (x + y + z)/3 = 190 Or, x + y + z = 570 ….. (1) And, (x + z)/2 = 160 Or, x + z = 320 ….. (2) From equation 1 and 2 Number of books on polity = y = 250 Number of books on geography = 0.8 × 250 = 200 Therefore, number of books on history = 570 – (250 + 200) = 120
Which is the hottest planet in the solar system?
Which of the following is the smallest continent by land area?
Dudhsagar Falls lies on which of the following rivers?
What term describes Earth's closest point to the Sun in its orbit?
The Sunda Trench is located in the ________.
Machkund Hydroelectric Project is a joint venture of which states?
Deserts account for approximately what percentage of the Earth’s land surface?
What does the term "Gracilaria" refer to?
Which planet in our solar system has a highly tilted rotational axis?
In which of the following region midnight Sun is visible?
