176. If $$\frac{x}{y}$$=$$\frac{3}{4}$$ the ratio of $$(2x+3y)$$ and $$(3y-2x)$$ is
177. The percentage increase in the surface area of a cube when each side is doubled is
178. A shopkeeper gains 17% after allowing a discount of 10% on the marked price of an article. Find his profit percent if the articles are sold at marked price allowing no discount.
179. A man spends 75% of his income. His income is increased by 20% and he increased his expenditure by 10%. His savings are increased by
180. Cost price of 100 books is equal to the selling price of 60 books. The gain percentage/loss percentage is
181. The ratio of each interior angle to each exterior angle of a regular polygon is 3 : 1. The number of sides of the polygon is
182. A sum of money lent out at simple interest amounts to Rs. 720 after 2 years and Rs. 1020 after a further period of 5 years. Find the principal.
183. If m - 5n = 2, then the vlaue of $$(m^{3} - 125n^{3}$$ - 30 mn) is
184. The average of 7, 11, 15, x, 14, 21, 25 is 15, then the value of x is
185. If $$x+\frac{1}{x}=2$$ then the value of $$x^{12}+\frac{1}{x^{12}}$$ is
186. Find the square root of $$\frac{(0.064-0.008)(0.16-0.04)}{(0.16+0.08+0.04)(0.4+0.2)^3}$$
187. If two medians BE and CF of a triangle ABC, intersect each other at G and if BG = CG, ∠BGC = 60° and BC = 8 cm then area of the triangle ABC is
188. Given that $$x^{3} + y^{3} = 72$$ and $$xy = 8$$ with $$x > y$$. Then the value of $$(x - y)$$ is
189. If two supplementary angles differ by 44°, then one of the angles is
190. If the sum of two numbers, one of which is $$\frac{2}{5}$$ times the other, is 50, then the numbers are
191. A boat can travel with a speed of 13 km/hr in still water. If the speed of stream is 4 km/hr in the same direction, time taken by boat to go 63 km in opposite direction is
192. The measures of two angles of a triangle are in the ratio 4 : 5. If the sum of these two measures is equal to the measure of the third angle, find the smallest angle.
193. A person of height 6ft. wants to pluck a fruit which is on a 26/3 ft. high tree. If the person is standing 8/√3 ft. away from the base of the tree, then at what angle should he throw a stone so that it hits the fruit ?
194. The angle of elevation of a tower from a distance of 100 metre from its foot is 30°. Then the height of the tower is
195. A can do a work in 10 days and B in 20 days. If they together work on it for 5 days, then the fraction of the work that is left is
196. Two circles touch each other externally. The sum of their areas is 130 $$\pi$$ sq cm and the distance between their centres is 14 cm. The radius of the smaller circle is
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