The length, breadth and height of a room is 21 metres, 12 metres and 16 metres. What will be the length of the largest rod that can be placed in that room?

A alone can complete a work in 6 days and B alone can complete the same work in 8 days. In how many both A and B together can complete the same work ?

What is the Highest Factor of $$ {2^{3}×{3^{5}}} and \ {2^{3}×{3^{5}}}$$ ?

A sum becomes 5 times of itself in 3 years at compound interest (interest is compounded annually). In how many years will the sum becomes 125 times of itself?

The height of a cone is 16 cm and radius of its base is 30 cm. If the rate of painting it is Rs.14/cm², then what will be the total cost in painting the curved surface of cone from outside?

If Cost price of an article is Rs.220 and profit is 20 %, then what will be the selling price of the article?

A sum become Rs. 10,650 in 5 years and Rs.11076 in 6 years at simple interest. What is the sum?

Rajesh goes to his office at the speed of 25km/hr and return to his home at the speed of 20 km/hr. If he takes total 9 hours, then what is the distance between his office and home?