A works twice as fast as B and B works twice as fast as C. All three working together can finish a task in 4 days with the help of D. If D alone can finish the same task in 16 days, then in how many days will A alone finish 75 % of the same task?

The Value of $$ {\sqrt{6-\sqrt{17-2\sqrt{72}}}}$$ is closest to:

An observer who is 1.62-meter-tall is 45 meters away form a pole. The angle of elevation of the top of the pole from his eyes is 30°. The height ( in meter) of the pole is closet to:

A started a business with a capital of Rs.1,12,000. After 2 months, B joined the business with a capital of Rs.80,000 and after another 2 months, C joined the business with a capital of Rs.72,000. After 10 months from the start of the business, B withdrew Rs.8,000 and C also with drew Rs.8,000. If B received Rs.9,800 as his share in the profit at the end of a year, then the total profit was:

A is 40 % more than B and B is 60% less than C. If C is 60 % more than D, then which of the following is true?

The average score of 42 students in a test is 69. The ratio of the number of boys to that of girls is 10 : 11. The average score of the boys is 20% more than that of the girls. The average score of the boys is:

In an office, 70% of the total number of employees are females. 80 % of the total number of employees, including 85 males, got promotion. If there are 105 female employees, then what percentage of female employees got promotion?

The average of eleven numbers is 68. The average of the first numbers is 78 and that of the next four number is 63. The 9^th number is two time the 11^th number and the 10^th number is 4 less than the 11^th number. What is the average of the 9^th and 11^th numbers?