Easy Tutorial
For Competitive Exams

A man can row 4.5 km/hr in still water. It takes him twice as long to row upstream as to row downstream. What is the rate of the current ?

3.5 km/hr
2.5 km/hr.
4.5 km/hr.
1.5 km/hr
Explanation:

Speed of boat in still water (b) = 4.5 km/hr. Speed of boat with stream (Down Stream), D = b + u Speed of boat against stream (Up stream), U = b - u It is given upstream time is twice to that of down stream. ? Downstream speed is twice to that of upstream. So b + u = 2(b - u) u =b/3 = 1.5 km/hr.

Additional Questions

A sum of money amounts to Rs. 9800 after 5 years and Rs. 12005 after 8 years at the same rate of simple interest. The rate of interest per annum is

Answer

A man starts walking at 3 pm . he walks at a speed of 4 km/hr on level ground and at a speed of 3 km/hr on uphill , 6 km/hr downhill and then 4 km/hr on level ground to reach home at 9 pm. What is the distance covered on one way?

Answer

In a group of cows and hens, the number of legs are 14 more than twice the number of heads. The number of cows is

Answer

I have a few sweets to be distributed. If I keep 2, 3 or 4 in a pack, I am left with one sweet. If I keep 5 in a pack, I am left with none. What is the minimum number of sweets I have to pack and distribute ?

Answer

2 trains starting at the same time from 2 stations 200km apart and going in opposite direction cross each other at a distance of 110km from one of the stations.what is the ratio of their speeds ?

Answer

If 9x-3y=12 and 3x-5y=7 then 6x-2y = ?

Answer

Two bus tickets from city A to B and three tickets from city A to C cost Rs. 77 but three tickets from city A to B and two tickets from city A to C cost Rs. 73. What are the fares for cities B and C from A ?

Answer

The total of the ages of Amar, Akbar and Anthony is 80 years. What was the total of their ages three years ago ?

Answer

A man took loan from a bank at the rate of 12% p.a. simple interest. After 3 years he had to pay Rs. 5400 interest only for the period. The principal amount borrowed by him was.

Answer

The total age of A & B is 12 years more than the total age of B & C. C is how many year younger than A.

Answer
Share with Friends
Privacy Copyright Contact Us