If a sailer sails 12 km distance within 5 hours against the flow of a river. If he sails 22 km distance in same time along the flow of the river. Then velocity of the river is _______

A discount of   is given to the customer on the marked price of an article. A man bought the article for Rs.39. The marked price of the article is:

Three numbers are in the ratio 5: 7: 12. If the sum of the first and the third numbers is greater than the second number by 50. The sum of the three numbers is 

A and B can do a piece of work in 20 days and 30 days respectively. They started the work together but after 8 days they doing work in alternate days, started with B. how many days the work will be completed? 

A and B invested in the ratio 3 : 2 in a business. If 5% of the total profit goes to charity and A’s share is Rs. 855, find the total profit.

if the square root of 841 is 29, then square root of 0.0000084 is equal to: 

A certain sum amount to Rs.5832 in 2 year at 8% per annum at compound interest, the sum is

Direction (94-98): Study the following table to answer the given questions.
         Centre and Post-wise Numbered of candidate

In Kolkata, number of Specialist Officers is approximately what percent of that of Officers?