Constable GD for CPO -CPMF (CISF, BSF, ITBP, SSB ) and Delhi Police selected after Objective Questions Exam by SSC. All the details, Study Material PDF, Book, Old question papers area available for free download.
If the average of two numbers is 13 and the square root of their product is 12, then the difference between the numbers is: Options:a) 8b) 18c) 10d) 12 Solution: Let the two numbers are = a and bAverage of number = $ \frac{a+b}{2}=13$a+b =26Product = $ \sqrt{a \times b} =12$a x b =144 Formula […]
Pipes A and B can empty a full tank in 15 minutes and 20 minutes, respectively, while pipe C alone can fill the empty tank in 8 minutes. If pipes A, B and C are opened together, then in how many hours will the tank be filled? Options a) 2.5b) 1.5c) 2d) 3 Solution As
A factory requires 56 machines to manufacture a given number of articles in 144 days. How many machines will be required to produce the same number of articles in 96 days? Optionsa) 63b) 84c) 77d) 81 Solutions As per questionNo. of machine = 56Days = 144$ \frac {M_1 \times D_1}{W_1} $ = $ \frac {M_2
The average height of 20 students of class 8 is 152 cm and the average height of 15 students of class 9 is 168 cm. What is the average height (to the nearest cm) of the students of both classes? Options a) 159b) 160c) 157d) 158 Solution As per questionThe average height of 20 students
A sum of Rs 73,500 is divided among A, B, C and D in the ratio 3 : 7 : 9 : 11, respectively, What is the sum of the shares of A and D? Options a) Rs. 34,300b) Rs. 39,200c) Rs. 24,500d) Rs. 29,400 Solution As per question Amount = 73500A : B :
The value of $ \dfrac {(251)^3 +(249)^3}{25.1 \times 25.1 – 624.99 + 24.9 \times 24.9}$ is $ 5 \times 10^k$, where the value of k is : Options a) 4b) 6c) 3d) 5 Solution As per question$ \dfrac {(251)^3 +(249)^3}{25.1 \times 25.1 – 624.99 + 24.9 \times 24.9} = 5 \times 10^k$ Let value of a
A can do a certain work in 15 days. B is 10% less efficient than A, and C is 20% more efficient than A. All the three work together for 3 days. The remaining work is completed by D alone in $ 9\frac12$ days. D alone can complete the original work in: Options:a) 15 daysb) 18 daysc)
The difference between the height and the radius of a solid cylinder is 23 cm. The total surface area of the cylinder is 1628 cm22,The height and the radius of the cylinder, respectively, are π=$ \frac {22}{7}$ : Options a) 33 cm , 10 cmb) 30 cm , 7 cmc) 32 cm , 09 cmd)
The number of years taken for a sum of Rs 5,000 to become Rs 5,832 at a rate of 16% per annum compounded half yearly, will be: Options a) 1.5 yearsb) $ \frac 12$ yearsc) 2 yearsd) 1 years Solution As per question P = 5000A = 5832R = 16% Rate half yearly (r) =
A shopkeeper sold an article at a gain of 20%. Had he bought it for 20% less than the original cost and sold it for Rs 10 less, he would have gained 25%. Then the Cost Price of the article is: Options:a) Rs 45b) Rs 60c) Rs 50d) Rs 40 Solution Assume Cost Price (CP)