What is the mode of the distribtuion

If a-b=4 and a²+b²=40,where a and b are positive integers,then a³+(b³)² is 

A rectangular paper of 44cm long and 6cm wide is rolled to from a cylinder of height equal to width of the paper.The radius of base of the cylinder so rolled is

The diagonals of three faces of a cuboid are 13,√281 and 20 linear units.Then the total surface area of the cuboid is

From a circular piece of cardboard of radius 3 cm,two sectors of 40° each have been cut off.The area of the remaining portion is

What is the median of the distribution?