Question
Who introduced the concept of virtual
water?Solution
The concept was introduced by John Anthony Allan to describe the hidden flow of water when food or other commodities are traded.
The path of a ray of light incident on an interface separating two media is shown in the figure below. The refractive index of medium A with respect to ...
The LCM of 48, 72 and another number, x, is 576. Which of the values given below can be the value of x?
If the average cost price of 20 identical pens decreases by Rs. 2 after replacing one pen with a new pen that costs Rs. 80, what was the original cost p...
Which one of the following pairs of Zonal Railways and their Headquarters is not correctly matched?
Coal Mines are located in which district of Madhya Pradesh?
The income of Tina is Rs.22000 and she saves 30% of her income. The savings of Kajal is Rs.5000 more than that of Tina and she spends 60% of her income....
In a class of 225 students, 125 are girls and remaining are boys. Among boys, the ratio of number of boys who are wearing caps to those who are not wear...
An economy is called agrarian if its share of the primary sector is 50 per cent or more in the total output (the GDP) of the economy. With context Indi...
The speed of a boat in still water is 6 km/hr more than that of the current. The time taken by the boat to cover 725 km downstream is 14.5 hours. Find t...
The Badami rock inscription of Pulakesin-I is dated in Saka Year 465. If the same work to be dated in Vikram Samvat, the year would be
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