Profit = 450 - 300 = 150. Profit% = (150/300) × 100 = 50%
Work = 5 × 12 = 60 worker-days. With 8 workers: 60/8 = 7.5 days
SI = (P × R × T)/100 = (2000 × 8 × 3)/100 = 480
Larger number = 80 + (25% of 80) = 80 + 20 = 100
Let A's age = 3x, B's age = 5x. 3x + 5x = 40, so 8x = 40, x = 5. A's age = 15 years
40% of 250 = (40/100) × 250 = 100
Average speed = Distance/Time = 360/6 = 60 km/h
12 = 2² × 3, 18 = 2 × 3². LCM = 2² × 3² = 36
Discount = 15% of 800 = 120. Selling Price = 800 - 120 = 680
3x + 5 = 20 → 3x = 15 → x = 5
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