What is the rate of interest percent per annum?

Statements:
I. The difference between the compound interest and simple interest earned in two years on the amount invested is Rs 100.
II. The amount becomes Rs 19500 is three years on simple interest.
III. The simple interest accrued in two years on the same amount at the same rate of interest is Rs 3000.

What is the speed of the train in kmph?

Statements:
I. The train crosses an ‘x’ metre-long platform in ‘n’ seconds.
II. The length of the train is ‘y’ metres.
III. The train crosses a signal pole in ‘m’ seconds.

How many students passed in first class?

Statements:
I. 85% of the students who appeared in examination have passed either in first class or in second class or in pass class.
II. 750 students have passed in second class.
III. The number of students who passed in pass class is 28% of those passed in second class.

What is the amount invested in Scheme ‘B’?

Statements:
I. The amounts invested in Schemes ‘A’ and ‘B’ are in the ratio 2 : 3.
II. The amount invested in Scheme ‘A’ is 40% of the total amount invested.
III. The amount invested in Scheme ‘A’ is Rs 45000.

What is the cost of flooring a rectangular hall?

Statements:
I. The length of the rectangle is 6 metres.
II. The breadth of the rectabgle is two thirds of its length.
III. The cost of flooring the area of 100 cm² is Rs45.