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I. 35x² - 46x – 16 = 0 35x² - 56x + 10x – 16 = 0 7x(5x – 8) + 2(5x – 8) = 0 (7x + 2) (5x – 8) = 0 ∴ x = -2/7, 8/5 II. 35y² - 116y + 96 = 0 35y² - 56y - 60y + 96 = 0 7y(5y – 8) – 12(5y – 8) = 0 (7y – 12) (5y – 8) = 0 ∴ y = 12/7, 8/5 Hence, x ≤ y
A boat takes 3 hours to travel 24 km downstream and 4 hours to travel 16 km upstream. What is the speed of the current?
A boat can cover 130 km in downstream in 10 hours and 120 km in upstream in 8 hours. Find the speed of boat in still water
A man row a boat 1 km in 5 min, along the stream and 6 km in 1hrs against the stream, The speed of the stream will be