`{:(,"Column A",,"Column B"),(14.,"Area of a trapezium is_______.",(a),4m^(2)),(15.,"If the volulme of a cube is" 512 cm^(3)", then the lateral surface are is ________.",(b),64 cm),(16., "If the diagonal of a square is" sqrt(8)m", then its area is ________.",(c ),((1)/(2))"(Sum of the parallel sides) (Distance between them)"),(17., "If the radius of the circle of angle" 45^(@)"is ______.",(d),((1)/(2))"(Product of the diagonals)"),(,,(e ),256cm^(2)),(,,(f),19.5 m^(2)):}`

`{:(,"Column A",,"Column B"),(14.,"Area of a trapezium is_______.",(a)

1.	`{:(,"Column A",,"Column B"),(14.,"Area of a trapezium is_______.",(a),4m^(2)),(15.,"If the volulme of a cube is" 512 cm^(3)", then the lateral surface are is ________.",(b),64 cm),(16., "If the diagonal of a square is" sqrt(8)m", then its area is ________.",(c ),((1)/(2))"(Sum of the parallel sides) (Distance between them)"),(17., "If the radius of the circle of angle" 45^(@)"is ______.",(d),((1)/(2))"(Product of the diagonals)"),(,,(e ),256cm^(2)),(,,(f),19.5 m^(2)):}`
Answer» Correct Answer - C 14.Option (c) : `"Area of trapezium"=((1)/(2))("Sum of the parallel sides")("Distance between them")` 15. Option (e): `"Volume of cube "a^(3)=512` `rArra^(3)=8^(3)rArra=8cm` `"Later surface area"=4a^(2)=4xx8^(2)=4xx64=256cm^(2)` 16. Option (a) : Diagonal of square `(d)=sqrt8cm` `therefore"Area"=(d^(2))/(2)=((sqrt8)^(2))/(4)=4m^(2)` 17. Option (f) : Perimeter of a sector = `l+2r` `=(theta)/(360^(@))2pir+2r=(45^(@))/(360^(@))xx2xx(22)/(7)xx7+2xx7` `=(1)/(2)xx2xx22+14` `=(22)/(4)+14=5.5+14=19.5cm`