Let the speed of the stream be ‘x’ km/hr Therefore, speed of the boat in still water = 6.5x km/hr Upstream speed of the boat = 6.5x – x = 5.5x km/hr Downstream speed of the boat = x + 6.5x = 7.5x km/hr According to the question, 7.5x – 5.5x = 24 => 2x = 24 => x = 12 Therefore, upstream speed of the boat = 5.5x = 66 km/hr Required time taken = 330/66 = 5 hours
The average mark obtained by Khushi in four papers was 51, and in the fifth paper, she obtained 56 marks. Find his new average in all five papers.
In a cricket match the captain of one of a team scored 24 runs more than the average runs scored by the remaining 7 batsmen of that team who batted in t...
Mukesh has twice as much money as Soham, Soham has 50% more money than Pankaj. If the average money with them is Rs.110, then Mukesh has
The average age of a class of 20 girls is 14 years. If 5 new girls having average age of 9 years join the class, then the average age of the class becomes:
The average of a set of 25 numbers is 98. For the first 14 numbers, the mean is 84, and for the last 8 numbers, the mean is 112. ...
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. ...
The average number of books on Biology, Chemistry, and Physics in a book shop is 300. Biology books are 150 more than the average number of Chemistry an...
X and Y have weights of 36 kg and 60 kg, respectively. Z weighs 12 kg less than X. Calculate the average weight of X, Y, and Z.
The average of five even numbers is 38. If we replace two of these even numbers, 88 and 92, with a single even number X, the new average decreases by 4....
The average weight of 7 men decreases by 3 kg when one of them weighing 150 kg is replaced by another person. Find the weight of the new person
