A bullet travels at 750 m/s. How long will it take to travel 1 km?

In △ABC, right angle at B, if   $$tan\ A={1\over 2}$$, then the value of $$sinA(cosC+cosA)\over cosC(sin C-sinA)$$ is :

Shashi sells two articles for ₹5,000 each with no loss and no profit in the overall transaction. If one article is sold at $$16{2\over 3}\%$$loss, then the other is sold at a profit of:

What should come in place of the question mark '?' in the following number series?

0.25, 1.25, 4.5, ?, 70, 355

A circle touches all four sides of a quadrilateral ABCD. If AB = 18 cm, BC = 21 cm and  = 15 cm, then length CD is: 

Find the value of $$ (2 {1\over6}+1 {13\over18}-{1\over6}) × {16÷4}$$

AB is diameter of a circle with centre 'O'. CD is a chord which is equal to the radius of the circle. AC and BD are extended so that they intersect each other at point P. Then find the value of ∠ APB.

If 18 men can finish a job in 26 days, then, in how many days will 13 men finish the same job?