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
Q.22 The mean proportion between 9 and 25 is……
(A) 10
(B) 12
(C) 15
(D) 17
Q.23 The third proportion to 12 and 30 is…..
(A) 40
(B) 45
(C) 50
(D) 75
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
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
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
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
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
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
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
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