Get The Wrong Idea

1.       What is the volume of the cylindrical tank ? Statement I:  Diameter of the base is equal to the height of the tank. Statement II:  Height of the tank is 20 m. Statement III:  Area of the base is 320 sq. m. A) Only I and III. B) Only I C) Only III D) Any of the two E) None of these 2.       What is the selling price of the camera if no discount is offered ? Statement I:  Cost price of the camera is Rs.10,000. Statement II:  Profit earned was  20%. Statement III:  Had 20% discount been offered on selling price  the profit would have been Rs. 700. A) Only III B) Only II and III C) Only I and II D) All of these E) Any two of these 3.       How many students failed in class 6 ? Statement I:  400 students passed in class . Statement II:  Number of students failed in class 6 is 10% of those of failed in class 7? Statement III:  75% of the students who appeared in examination have passed either in class 8. A) Only II and III B) Only I and II C) Only II

AL/RATIO & PROPORTIONS 001   1.        If a : b = 5 : 9 and b : c = 4 : 7. Find a : b : c 2.        If a : b = 2 : 3 , b : c = 4 : 5 and c : d = 6 : 7, then a : d is                     I.             Find a :   b : c : d 3.        The number to added to each of the numbers 7,16,43,79 to make the number in proportion is 4.        If A : B : C =   2: 3: 4 then   is equal to 5.        If A : B =   , B : C =   and C : D =   then ratio A : B : C : D is 6.        2A = 3B = 4C then A : B : C is 7.        If 2A = 3B and 4B = 5C then A : C is 8.        The ratio of 4 3.5 : 2 5 is same as 9.        If 0.75 : x :: 5 : 8, then x is equal to 10.    If   then the value of x is 11.    x : y = 5 : 2 then (8x + 9y ) : (8x + 2y) is 12.    If 15% of x = 20% of y, then x:y is 13.    (4x 2 – 3y 2 ) : (2x 2 + 5y 2 ) = 12 : 19 then x : y is 14.    If ( a+ b) :