Quantitative Aptitude - Arithmetic Ability Questions

A person borrows some money for 4 years at the rate of simple interest. If the ratio of principal and total interest is 5 : 1, then what is the rate ( in percentage) of interest?

What is the length of the arc whose central angle is 30° and radius of the circle is 21 cm?

A trader buys 800 kgs of tomatoes for Rs 7200. 10% tomatoes are damaged in transportaion. At what rate (Rs/Kg) should he sell the rest to earn 30% profit?

Marked price of an item is Rs 200. On purchase of 1 item discount is 22%, on purchase of 4 items discount is 33%. Rabia buys 5 items, what is the effective discount?

Select the related number from the given alternatives.
0.02 : 0.002 :: 1/3 : ?

The area of the largest triangle that can be inscribed in a semicircle of radius 6m is

What will be the acute angle between the hour-hand and the minute -hand at 2:13 p.m?

At what rate of compound interest (in %) per annum will a sum of Rs. 15,000 become Rs. 18,150 in 2 years?