One filling pipe P is three times faster than another filling pipe Q, if P can fill tank in 24 hours, then what is the time taken to completely fill the tank if both the pipes are opened together?

Find the cost in rupees for carpeting a room 65dm× 30 dm at Rs. 45 per sq.m

The average of 8 numbers is 27. If each of the numbers is multiplied by 8, find the average of new set of numbers.

Three men step off together from the same spot. Their steps measure 63 cm, 70 cm and 77 cm respectively. The minimum distance each should cover so that all can cover the distance in complete steps is 

If the sales tax be reduced from $$ 3{1\over2}$$ % to $$ 3{1\over3}$$%, what difference does it make to person who purchases an article whose marked price is Rs.8400? 

The speed of a boat in still water 11 km/hr. It can go 12 km upstream and return downstream to the engine point in 2hr 45min. What is the speed of stream?

If 2sinθ+cosθ= $${7\over3}$$ then the value of (tan²θ-sec²θ) is