Find the areas of the circle of radius 3.458 cm upto correct significant figures.

Find the area of a circle of radius 35 cm.

The length , breadth , and thickness of a sheet are respectively 4.234 m , 1.005 m, and 2.01 cm find the area and the volume of the sheet to correct number of significant figure

The length, breadth and height of a rectangular block of wood were measured to be l= 12.13+-0.02cm, b= 8.16 +- 0.01 cm, h=3.46 +- 0.01 cm . Determine the precentage error in the volume of the block upto two significant figures.

Find the area of the segment of a circle of radius 14 cm if the length of the corresponding arc APB is 22 cm.[use pi = 22/7 ]

Find the areas of the circles whose radii are given below:(iii) 49 cm

Find the areas of the circles whose radii are given below:(v)21 cm

Find the areas of the circles whose radii are given below:(vi)217 cm

The radius of two circles are in the ratio 3 : 4 and sum of their areas is equal to the area of a circle whose radius is 35 cm. Find the ratio of the areas.

Find the areas of the circles whose diameters are given below:(i)20 cm

The radius of two circles are in the ratio 3 : 4 and sum of their areas is equal to the area of a circle whose radius is 35 cm. Find the ratio of the circumference.