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x³ + y³+ z³ - 3xyz = (x+y+z)× 1/2 [3( x² + y² + z²) - (x + y + z)2] => 842 - 3xyz = 7× 1/2 [3 × 85 - 49] => 842 - 3xyz = 7× 103 => 3xyz = 842 - 721 => 3xyz = 121 =>√3 xyz = √121 = 11
A salesman is allowed 12% commission on the total sales by him and a bonus of 1% on the sales over Rs. 10000. If the total earnings of a salesman is Rs....
In a city, the number of persons travelling by bike is 65% the number of persons travelling by metro. The number of persons travelling on foot is 80% th...
The marks obtained by A is 25% more than B, and the marks obtained by C is 150 more than the difference of the marks obtained by A and B. If C obtained ...
Rakesh obtained 25% more marks than Ambuj Suresh obtained 52% less marks than Rakesh. Marks obtained by Suresh are what percent less than marks obtained...
There are two slabs of income tax, 7% tax for income up to 3 lakh and 12.5% for income above 3 lakh. Nitin tried to evade tax by hiding some of the inco...
If X = 75% of Y and Y = 125% of Z, then find the ratio of X to that of Z.
If the price of rice has increased from Rs 40 per kg to Rs. 60 per kg, by how much percent a person has to decrease his consumption so that his expendit...
A number is first increased by 20% and then decreased by 20%. If the net change in the number is 128, then find the original number.
A farm has a total of 15,000 chickens. Out of these, 28% are foreign breed chickens, while the rest are native breed chickens. Among the native breed ch...
