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The paradox of value (also known as the diamond–water paradox) is the contradiction that, although water is on the whole more useful, in terms of survival, than diamonds, diamonds command a higher price in the market. Marginal utility, not total utility, is the critical determinant of price. The price of water is relatively low because the marginal utility is relatively low.
A barrel has 140 liters of mixture of alcohol and water, in which water is 10%. 30 litre of this mixture was taken out and replaced with “X”...
The perimeter of a rectangle is 140% more than perimeter of a square of side 15 cm. If the length of rectangle is 220% more than side of square then fin...
The radius of the two cylinders is in the ratio of 1: 4 and their heights are in the ratio of 4: 3. Their volumes will be in the ratio.
If the length of a rectangle is increased by 30% and its breadth is decreased by 20%, then the area of the rectangle will be increased or decreased by h...
A street of width 25 metres surrounds from outside a rectangular garden whose measurement is 190 m × 220 m. The area of the path (in square metres...
Radius of a cylindrical vessel is 3cm less than breadth of rectangle, while height of cylindrical vessel is equal to length of rectangle, whose area is ...
Perimeter of a rectangle is 50% more than that of a square of side 30 cm. If the difference between the length and breadth of the rectangle is 7 cm, res...
The outer radius of a hollow metallic spherical ball is 12 cm while the thickness of the metal used to make it is 6 cm. Find the volume of the metal use...
Mr. Arun rows a boat with the stream at 10 km/hr and against the stream in 5 km/hr. In still water, his rate of rowing in km/h is:
The area of the rectangular field is 540 m² and its perimeter is 94 m. Find how much percent (approximately) less the breadth of the field is compared ...