If N:38∷ 3:57, Find N.

If the perimeter of a circular plot is equal to the perimeter of a square plot, what will be the ratio of their areas?

A solid metallic cylinder of base radius 3 cm. and height 5 cm. is melted to form cones, each of height 1 cm. and base radius 1 mm. The number of cones is -

Solve it 0.002 × 0.5=?

A man purchases 100 copies of a book from the publisher and gets a discount of 25%. He buys 50 copies from a retailer at a discount of 10%. He got an overall discount of:

If $$ {1+sinθ\over {1-sinθ}}={p^{2}\over{q^{2}}}$$, then sec θ is equal to:

The speed of a train is 4/7 of the speed of a car. The car covers 252 m. distance in 9 seconds. In what time will the train cover a distance of 64m.?

If A is equal to 20% of B and B is equal to 25% of C; then what percent of C is equal to A?