in triangle abc angle c is 90degrees and cd perpendicular to am prove that bc square/ac square=bd/ad
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Answer:
No of tiles = 3000
Area of one tile = 1/2 × d1 × d2
= 1/2 × 45 × 30
= 45 × 15
= 675 cm²
Area of 3000 tiles = 675 × 3000
= 2025000 cm²
Area of 3000 tiles in m² = 2025000 × (1/100)
= 202.5 m²
Cost of polishing 1 m² = Rs 4
Cost of polishing 202.5 m² = 202.5 × 4
=2025/10 × 4
= 810.
The total cost of polishing the floor is Rs 810.Two persons fit new window in 3 days.
Then, by 1 person new window will fit
= 2/3 = 1/x
= (2 × 3) = 1x
= 6 = 1x
= x = 6/1 = 6
x = 6
By 1 person the new window will fit in 6 days.
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