Question
A boat running downstream covers a distance of 60 km in
6 hrs and covering the same distance upstream in 15 hrs. What is the speed of a boat in still water?Solution
Downstream speed = 60/6 = 10 km/hr Upstream speed = 60/15 = 4 km/hr So speed of boat in still water = (10 + 4)/2 = 7 km/hr
- In a warehouse, there are 200 washing machines and 300 microwaves. The average price of a washing machine is Rs. 15,000 while the average price of a microw...
The average of 8 numbers is 5.95. The average of two of them is 5.4, while the average of the other two is 5.86. the average of the remaining four numbe...
The average of 13 numbers is 10.The average of first 6 numbers is 8 and that of the last 6 numbers is 10. What will be the 13th number?
The average wage of a group of 25 labourers is Rs. 470. If 4 persons receiving average wage of Rs. 350 leave the group and 2 persons receiving average w...
The average of five positive numbers is 56. If the first number is three-fourth of the sum of the last four numbers, then the average of the last four n...
The average of 8 numbers is 22. When two new numbers 'p' and 'q' are added, the average increases by 3. If p - q = 10, find the value of q.
A student has two types of markers: Marker A priced at $3 each and Marker B priced at $5 each. If the student purchases a total of 12 markers, with an a...
In a company, the average salary of 30 employees is ₹40,000. Out of these, the average salary of 20 employees is ₹35,000, and the average salary of ...
Each question contains a statement followed by Quantity I and II. Read the information clearly and answer your questions accordingly.Â
 Qu...
A set contains ten numbers. The average of the first six numbers is (x - 2), and the average of the last three numbers is (x + 3). The average of the en...
Relevant for Exams:
