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Start learning 50% faster. Sign in nowLet speed of boat in still water and speed of boat in upstream be ‘9x’ km/h and ‘5x’ km/h, respectively. Speed of stream = 9x – 5x = 4x km/h Speed of boat in downstream = 9x + 4x = 13x km/h So, 13x = 221/5 => x = 3.4 Speed of boat in still water = 9 × 3.4 = 30.6 km/h Desired time = 38.25/30.6 x 60 = 75 minutes
If A denote ÷, B denotes x, C denotes + and D denotes -, what is the value of the given expression?
32 B 40 A 8 C 10 D 12
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