Quantitative Aptitude - Arithmetic Ability Questions

A boat goes 8 km upstream and 12 km downstream in 7hours. It goes 9 km upstream and 18 km downstream in 9 hours. What is the speed (in km/h) of the boat in still water?

A photographer allows a discount of 10% on the advertised price of a camera. The price (in Rs) that must be marked on the camera, which cost him Rs 600, to make a profit of 20% would be

Mr. Ankit is on tour to Siachin and he has Rs. 360 for his expenditure. If he exceeds his tour by 4 days, he must trim down his daily expenditure by Rs.3. Forhow many days is Mr. Ankit is on tour?

Daily local train ticket costs Rs 60 and Monthly Pass costs Rs 1566. If I buy the Monthly Pass and travel for 29 days in a month than I save?

If (x+1/x) = 5, then the value of 5xx2+5x+1?

If a-b=1 and a3-b3 = 61, then the value of ab will be

20% of a man's salary is paid as rent, 60% are his living expenses and 10% are his savings. If he spends remaining  30 on the education of his children, find his salary

What fraction of 2 hours is 12 seconds?