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Speed of train = (Length of train + Length of Platform)/Required time Length of train = 360 m Crossing time of platform = 2 × 60 = 120 sec Length of platform = 360 × 2 = 720 m Let the speed of train be x. Speed of train = (360 + 720)/120 ⇒ x = 1080/120 = 9 m/s
In an examination, the average marks obtained by the students is 40. After correcting the quantitative mistakes, the average of 50 students is reduced t...
The certain sum amounts to Rs11313.5 in 2(1/2) years at 12% p.a., interest compounded 10 months. The sum (in Rs) is:
The average age of a class of 24 girls is 15 years. If 6 new girls having average age of 10 years join the class, then the average age of the class beco...
Ram played his first 4 matches with an average of 5 goals per match. However, he couldn't score any goals in the following 3 matches. How many goals doe...
Average age of a class of 28 students is 10 years. Average age of the class is increased by 12 months if the age of the teacher is included. Find...
The average expenditure of a man for the first 6 month is Rs.6000 and for the next 6 months is Rs.9000. If he saves 15000 in that year then find his ave...
The average of n numbers is 66. If each of 54% of the numbers is increased by 13 and each of the remaining numbers is decreased by 12, then the n...
Each question contains a statement followed by Quantity I and II. Read the information clearly and answer your questions accordingly.
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The average of 18 numbers is 75. The average of the first nine numbers and the last six numbers is 62.5 and 82.5, respectively. T...
