Area of rhombus = \(\frac{1}{2}\)x d1 x d2
Area of rhombus = \(\frac{1}{2}\)x 45 x 30
Area of rhombus = 675 cm2
Area of one tile = 675 cm2
Area of 3000 tiles = 675× 3000 = 2025000 cm2
Area of toles in m2 = \(\frac{2025000}{10000}\) = 202.5 m2
Cost of tiles = 202.5× 4 = Rs 810.0