Quantitative Aptitude - Arithmetic Ability Questions

In which of the following quadrilaterals opposite angles are supplementary?

The diagonal of a square is 10 cm. What is the length (in cm) of its side?

A right circular conical structure stands on a circular base of 21m diameter and is 14m in height. The total cost of colour washing for its curved surface at Rs. 6 per sq. m. is
(Take Π = 22/7 )

The average age of 27 students of a class is 22. If the age of the teacher is also added to their ages, then the average increases by one. Find the age of the teacher.

Calculate the ratio of the area of two similar triangles if the sides of the triangles are in the ratio of 9:4.

A sum of Rs 5000 becomes Rs 8000 in 3 years, when invested in a scheme of simple interest. If the same sum is invested in a scheme of compound interest with same yearly interest rate (compounding of interest is yearly), then what will be the amount (in Rs) after 3 years?

In a rhombus _____.

A chord of a circle is equal to its radius. A tangent is drawn to the circle at an extremity of the chord. The angle between the tangent and the chord is