Q.17 A milk vendor purchases 33 litres of milk containing milk and water in the ratio 12: 1. He wants to make this a 11: 2 solutions of milk and water and sell the entire quantity at the cost price How much of water needs to be added?
(A) 3 litres
(B) 2 9/11 litres
(C) 2.5 litres
(D) None of these
Q.18 Nupur has 73 litres of wine in a drum. She replaces 3.65 litres of it with water and keeps doing so till the time the concentration of wine is less than 85%. The minimum umber of operations that Nupur has to perform is…….
(A) 3
(B) 4
(C) 2
(D) None of these
Q.19 A sells a bicycle to B at a profit of 20% and B sells it to C at a profit of 25%. If C pays Rs. 1500, what did A pay for it?
(A) Rs. 825
(B) Rs. 1000
(C) Rs.110
(D) Rs. 1125
Q.20 Two mixers and a TV costs Rs. 7000, while 2 TVs and a mixer cost Rs. 9800. The values of one TV is……
(A) Rs. 2800
(B) Rs. 2100
(C) Rs. 4200
(D) Rs. 8400
Q.21 A copper wire having 0.20 cm as the radius of its circular section is one-meter long. It is melted and spherical balls of radius 0.20 cm are made. The number of balls that can be made is……
(A) 300
(B) 375
(C) 275
(D) 350
Q.22 The altitude of a circular cylinder is increased six times and the base area is decreased to one-ninth of its value. The factor by which the lateral surface of the cylinder increases is….
(A) ½ m
(B) 2/3 m
(C) 3/2 m
(D) 2 m
Q.23 Binary coded decimal (BCD) numbers express each digit as a ……
(A) byte
IB) nibble
(C) bit
(D) all of these
Q.24 ASCII code is a 7 bit code for……
(A) letters
(B) numbers
(C) other symbols
(D) all of these
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