A man walks a certain distance and rides back in 4 hours 30 minutes. he could ride both ways in 3 hours. The time required by the man to walk both ways is 

A pipe can empty a tank in 40 minutes. A second pipe with diameter twice as much as that of the first is also attached with the tank to empty it . The two pipe together can empty the tank in: 

What are the roots of the equation log₁₀(x²-6x+45) =2?

Profit obtained on selling an article for Rs 540 is equal to the loss incurred on selling the article for Rs 370. if selling price is Rs. 910, Then what is the profit percentage? 

In how many years a sum of Rs. 3000 will yield an interest of Rs. 1080 at 12% per annum simple interest?

There are 2 teams - A and B. If 3 people are shifted from Team A to Team B, then Team B has thrice the number of members than Team A. If 2 people are shifted from Team B to Team A, then Team B has double the number of members than Team A. How many members does Team B have originally?