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When Soaps and detergents are added to water, they weaken the strength of the skinonthewater'ssurfaceduetosurfacetension by interfering with hydrogen bonding between water molecules. It happens because the polar end of the soap or detergent is also attracted to the water, thereby decreasing the surface tension.
Present age of ‘A’ is 40% more than that of ‘B’. If 11 years hence from now, ‘B’ will be 5 years younger than ‘A’, then find the sum of ...
Present age of ‘P’ is 60% more than that of ‘Q’. 8 years ago, ‘P’ was twice as old as ‘Q’. Find the present age of ‘Q’.
...The present average age of ‘X’ and ‘Y’ is 16 years, present average age of ‘X’ and ‘Z’ is 56 years and present average age of ‘Y’ an...
Four years from now, the age of 'A' will be 60% of the age of 'B' at that time. The combined present ages of 'A' and 'B' exceed the current age of 'C' b...
Present ages of 'A' and 'B' are in the ratio 3:5, respectively. If B's age, 12 years hence from now will be 9 times of A's age, 6 years ago from now, th...
Present average age of 4 friends: ‘A’, ‘B’, ‘C’ and ‘D’ is 33 years. If their ages are in the arithmetic progression in the same order a...
Pintu' is father of 'Qasim'. '2x' years ago from now, the age of 'Pintu' was four times the age of 'Qasim'. While, '2x' years hence from now, age of 'Pi...
The ratio of the present ages of P and Q is 7:4 respectively. If the age of P 15 years hence from now will be 125% more than the age of Q 4 years ago fr...
