Ratio and Proportion (Objective Type Question for Competitive Exam) (Part B)
Ratio and Proportion
Q.21 If A : B = 5 : 7 and B : C = 9 : 11, then A : C?
(A) 9 : 11
(B) 45 : 77
(C) 45 : 66
(D) 39 : 77
Ans . B
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Q.22 The mean proportion between 9 and 25 is……
(A) 10
(B) 12
(C) 15
(D) 17
Ans . C
Q.23 The third proportion to 12 and 30 is…..
(A) 40
(B) 45
(C) 50
(D) 75
Ans . D
Q.24 The ratio of milk and water in 66 kg of adulterated milk is 5 : 1. Water is added to it to make the ratio 5 : 3. The quantity of water added is……
(A) 12
(B) 32
(C) 32
(D) 52
Ans . D
Q.25 Ratio of speed of three cars is 2 : 3 : 4. The ratio of time taken by these cars to travel the same distance is……
(A) 2 : 3 : 4
(B) 3 : 6 : 4
(C) 6 : 4 : 3
(D) 4 : 3 : 6
Ans . C
Q.26 A cup contains milk and water in the ratio of 3 : 1. How much mixture should be taken out and water added to make the ratio 1 : 1?
(A) 1/3
(B) 1/4
(C) ½
(D) 1/5
Ans . A
Q.27 A can contains a mixture of two liquid A and B in proportion 7 : 5 . When 9 liters of mixture was drawn off and the can was filled with B, the proportion of A and B becomes 1 : 2. How many liters of mixtures was contained by the can initially?
(A) 15
(B) 21
(C) 36
(D) 25
Ans . B
Q.28 Five apples plus four pears costs as much as three apples plus seven pears. What is the ratio of the cost of 1 pear and cost of 1 apple?
(A) 2 : 3
(B) 3 : 4
(C) 3 : 1
(D) 4 : 3
Ans . A
Q.29 The ratio of the perimeter of an equilateral triangle having and altitude equal to the radius of a circle, to the perimeter of an equilateral triangle inscribed in a circle is…….
(A) 1 : 2
(B) 1 : 3
(C) 1 : Ö3
(D) Ö3 : 2
Ans . B
Q.30 The areas of two triangles of equal height are in the ratio of 7 : 12. If the base of the smaller trangle is 40 cm, then the base of the other is……
(A) 23.33
(B) 21 cm
(C) 68.75 cm
(D) 32.33 cm
Ans . C