Three containers of capacity 20L, 5L and 9L contain mixture of milk and water with milk concentrations 90%. 80% and 70% respectively. The content of three containers are emptied into a large vessel. What is the ratio of milk to water in the resultant mixture? a) 3:1 b) 41:7 c) 283:57 ...

The radius of a hollow sphere is 21 cm. It is cut into two equal halves by a plane passing through its center. What is 75% of the curved surface area of the hemisphere? a) 2090 b) 2080 c) 2070 d) 2060

If (2ax+b)²+4ac= b² then find the value of x(ax+b)? a)  a/bc b)  ab/c c) -c d) abc Sol:

The total number of student in sections A and B of a class is 504. The ratio of the number of students in A and B is 7:5. The average weight of the students in section B is 20% more than that of the students in section A. If the average weight of all the students in the class in 52 kg. then what ...

How many job applicant had applied if the ratio of selected to unselected was 19:17 given that if 1200 less had applied and 800 less was selected, then the ratio of selected to unselected would have been 1:1. a) 8100 b) 9600 c) 7200 d) 6900 Sol:

In each equal square, the shaded areas are equal. If ‘R’ is the radius of the quarter-circle on the right and ‘r’ is the radius of the circle on the left, what is R/r? a)            ½ ...

A certain sum of money was divided among A, B and C in a certain way that C got half as much as A and B together got. A got one third of what B and C together got. What is the ratio of A’s share to that of C’s share? a) 1:4 b) 3:4 c) 4:1 d) 3:5 Sol:

By an engine the consumption of coal is directly proportional to the square of its velocity when velocity is 50 mile/hour then consumption is 18 kg. If cost of coal is 25 paise/kg and expenditure is 12.5 Rs/hour is another case. Then find the consumption in travelling 50 miles? a) 93 kg b) 80 kg ...

If tan (8θ – 11°) tan (11θ – 13°) = 1, then find the value of tan10θ + cot5θ ? Sol: We know, if tanA. tanB = 1 Then, A + B = 90° Now, Tan(8θ – 11) . tan (11θ – 13) = 1 ∴ 8θ – 11 + 11θ – 13 = 90 ⇒ 19θ = 114 ⇒ θ = 6 Now,Tan10θ + cot 5θ

A contractor hires 36 men for a work, they complete 3/4th of the work in 15 days. After that work is stopped due to rain. 25% of the completed work is destroyed by rain and 6 men falls sick. Find the time in which remaining work will be completed. ? a)            9 days b)            12 days ...