a) $$\frac{{x + y}}{2}$$ b) $$\frac{{2xy}}{{x + y}}$$ c) $$\sqrt {xy} $$ d) $$\frac{{y - x}}{2}$$ Answer: c Explanation: ...
View QuestionAn ore contains 25% of an alloy that has 90% iron. Other than this, in the remaining 75% of the ore, there is no iron. How many kilograms of the ore are needed to obtain 60 kg of pure iron?
a) 266.66 kg b) 250 kg c) 275 kg d) 300 kg Answer: a Explanation: Let there is 100 ...
View QuestionA and B are two fixed points 5 cm apart and C is a point on AB such that AC is 3cm. if the length of AC is increased by 6%, the length of CB is decreased by
a) 6% b) 7% c) 8% d) 9% Answer: d Explanation: As A and B are fixed, C is ...
View QuestionThe population of a city is 35000. On an increase of 6% in the number of men and an increase of 4% in the number of women, the population would become 36760. What was the number of women initially?
a) 18000 b) 19000 c) 17000 d) 20000 Answer: cExplanation: $$\eqalign{ & {\text{Let number of men ...
View QuestionIf A’s salary is 25% more than B’s salary, then B’s salary is how much lower than A’s salary?
a) 20% b) $$16\frac{2}{3}\% $$ c) $$33\frac{1}{3}\% $$ d) 25% Answer: a Explanation: Let B's Salary is Rs. 100. ...
View QuestionIn the recent, climate conference in New York, out of 700 men, 500 women, 800 children present inside the building premises, 20% of the men, 40% of the women and 10% of the children were Indians. Find the percentage of people who were not Indian?
a) 77% b) 79% c) 83% d) 73% Answer: b Explanation: Number of Indians men present there = $$\frac{{700 ...
View QuestionP is 6 times greater than Q then by what per cent is Q smaller than P?
a) 84% b) 85.5% c) 80% d) 83.33% Answer: d Explanation: Let Q = 10. Then, P = 60. Q ...
View QuestionThe price of the sugar rise by 25%. If a family wants to keep their expenses on sugar the same as earlier, the family will have to decrease its consumption of sugar by
a) 25% b) 20% c) 80% d) 75% Answer: b Explanation: Let the initial expenses on Sugar ...
View QuestionA train approaches a tunnel AB. Inside the tunnel a cat located at a point i.e 5/12 of the distance AB measured from the entrance A. When the train whistles the Cat runs. If the cat moves to the exit B, the train catches the cat exactly the exit. The speed of the train is greater than the speed of the cat by what order ?
A train approaches a tunnel AB. Inside the tunnel a cat located at a point i.e. $$\frac{5}{{12}}$$ of ...
View QuestionA man walking at the speed of 4 km/hr,cross a square field diagonally in 3 minutes.The area of the field is?
a) 20000 sqm b) 25000 sqm c) 18000 sqm d) 19000 sqm Answer: a Explanation: ...
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