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Let the length of the train be ‘L’ metres. ATQ, 
Or, 36L = 24L + 4320 Or, 12L = 4320 Or, L = 360 metres Therefore, the length of the train is 360 metres. The speed of the train = 360/24 = 15 m/s
5 positive numbers are written on a piece of paper. Sum of first 3 numbers is 40 and ratio of the 4th and the 5th number is 2:3. If difference between t...
The average weight of 4 persons is 38 kg. The heaviest person’s weight is 22 kg more than the lightest person’s weight. If the average weight of the...
The average cost price of 15 pens (having equal cost price) decreased by Rs.2, when one of the pen is replaced by a new pen having cost price of Rs.70. ...
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In a College with 1200 students, the average age of the boys is 24 years and that of girls is 17 years. If the average age of the college is 22 years an...
Average of 20 numbers is 90. Average of first 8 numbers is 125 while average of last nine numbers is 40. If ninth number is 25% less than the tenth numb...
The average score obtained by 22 students in a class test is 68 marks. The top place was shared by 3 people who got the same score. If the lowest score ...
The average number of sweets distributed in a class of 90 students is 6. If lsquo;xrsquo; number of students newly joined the class and the average beco...
The average of five consecutive odd numbers is 77. What is the average of the first three numbers among them?
