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Speed of the first train = [240/15] m/sec = 16 m/sec Speed of the second train = [240/30] m/sec = 8 m/sec Speed = (16 + 8) m/sec = 24 m/sec Required time = (240 + 240)/24 sec = 20 sec
Average of 8 numbers is 80. If average of first four and last two numbers is 90 and 60, respectively then find the fifth number given that ratio of fift...
The average of the two numbers is 15, and the square root of their product is 12. What is the difference between the two numbers?
Average 20 numbers is ‘x’. If the average of first 12 numbers is 64.5 while average of last 5 numbers is 86.6 and 13th, 14th a...
A cricketer scored an average of 65 runs per match in the first 20 matches. In his next 10 matches, he scored runs with an average of ‘x’ runs per m...
Average age of company A is 26 years and average age of both companies A and B is 12 years. If the ratio of number of employees in company A and B is 2:...
The average age of 15 children and their teacher's age are 12 years. If the teacher's age is excluded, the average reduces by 2. What is the teacher's age?
The average salary of all males and females in an office is Rs.16000 and the total number of females in the office is 16. If the average salaries of mal...
Average run scored by a batsman in first ‘x’ matches is 43. In next 14 matches he scored runs with an average of 63 so that his overa...
Given a set of 25 numbers, the overall average is 60. The first 11 numbers in this set have an average of 48, while the last 15 numbers have an average ...
