8 men working for 9 hours a day complete a piece of work in 20 days. In how many days can 7 men working for 10 hours a day complete the same piece of work?

The vertices of the 1 cm side are cut from each corner of a square with a side of 4.5 cm. Find the circumference and area of the octagon formed?

The product of two numbers is 24 times the difference of these two numbers. If the sum of these two numbers is 14. Find the larger number?

Two - third of a consignment was sold at a profit of 5% and the remaining at a loss of 2 %. If the total profit was Rs. 400. then the value of the consignment was

X, Y and Z take 18 days to complete a piece of work. If X works alone he finishes the work in 36 days and if Y works alone he finishes it in 60 days. How long will it take Z to complete the work alone?

Find the difference between compound interest and simple interest on 5000 for 2 years at 8% p.a payable annually.

Find the area of the largest triangle made in a semicircle of r cm radius?

If $$x=(\sqrt2+1)^{1\over3} $$, the value of $$(x^3-{1\over {x^3}}) $$ is