135. A right pyramid stands on a squarebase of diagonal 10V2 cm. If th

1.	135. A right pyramid stands on a squarebase of diagonal 10V2 cm. If theheight of the pyramid is 12 cm, thearea (in cm2) of its slant surface is(A) 520(B) 420(C) 360(D) 260
Answer» Side of a square = 1/root2 10 root2 = 10 cm Slant height = sqrt(5^2 + 12^2)= sqrt(25 + 144)= sqrt(169) = 13 cm Lateral Surface area = 1/2Perimeter of baseslant height = 1/240*13= 260 cm^2 (D) is correct option please show me the diagram

135. A right pyramid stands on a squarebase of diagonal 10V2 cm. If theheight of the pyramid is 12 cm, thearea (in cm2) of its slant surface is(A) 520(B) 420(C) 360(D) 260

Answer»

Side of a square = 1/root2 *10 root2 = 10 cm

Slant height = sqrt(5^2 + 12^2)= sqrt(25 + 144)= sqrt(169) = 13 cm

Lateral Surface area = 1/2*Perimeter of base*slant height = 1/2*40*13= 260 cm^2

(D) is correct option

please show me the diagram