allery3000 rhombus tiles have diagonals 45 cm and 30 cm. Polishing costs ₹4 per m2. Total cost?
A₹810
B₹405
C₹1,620
D₹8,100
Answer & Solution
Correct answer: A. ₹810
1. One tile = (1/2) × 45 × 30 = 675 cm2.
2. 3000 tiles = 2,025,000 cm2 = 202.5 m2.
3. Cost = 202.5 × 4 = ₹810.
_Source: NCERT Class 8 Mathematics, Chapter 9 Mensuration, Exercise 9.1_
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