Quantitative Aptitude - Arithmetic Ability Questions

Find the standard deviation of {11, 7, 10,13, 9}

Find the curved surface area (in cm2) of a right circular cone of diameter 28 cm and slant height 12 cm.

In ΔABC measure of angle B is 900. If cotA = 8/15, and AB = 0.8cm, then what is the length (in cm) of side BC?

ΔPQR is right angled at Q. If m∠R=300, then find the value of (cosP - 1/3).

If the area of a semi-circle is 693 cm2, then find its radius (in cm).

The length and breadth of a rectangle are 15 cm and 8 cm respectively. Calculate its perimeter (in cm).

A boat covers a distance of 14 km upstream and 16 km downstream in 9 hours. It covers a distance of 12 km upstream and 40 km downstream in 11hours. What is the speed (in km/hr) of the boat in still water?

R borrowed Rs. 1,200 at 13% per annum simple interest. What amount will R pay to clear the debt after 5 years?