Speed of current is 25% of speed of boat in still water, if boat travelled 45 km downstream and returned back in total 12 hr. then find speed of boat in still water?
Speed of boat in still water : Speed of current = 100x : 25x => 4x : x According to question, => 45/(4x + x) + 45/(4x – x) = 12 => (135 + 225)/15x = 12 => x = 360/180 = 2 Speed of boat in still water = 4 × 2 = 8 km/hr
I. x³= ((4)5+ (15)³)/(3)4
II. 8y³=(-13)3÷ √1521+ (3y)³
I. x2 + 12√2 x + 22 = 0
II. y2 - 13√2 y – 28 = 0
What is the speed of the stream if a ship takes 15 hours to travel 240 km in calm waters, given that the ratio of its speed against the current to its s...
I. 2y² - 3y – 14 = 0
II. 3x² - 7x + 4 = 0
I. 2x² - 11x + 12 = 0
II. 12y² + 29y + 15 = 0
I. 3x² - 22 x + 40 = 0
II. 4y² + 22y + 24 = 0
I. 3y2 + 13y - 16 = 0
II. 3x2 – 13x + 14 = 0
I. 84x² - 167x - 55 = 0
II. 247y² + 210y + 27 = 0
I. 6x² + 37x + 45 = 0
II. 3y² - 11y + 6 = 0
I.√(3x-17)+ x=15
II. y+ 135/y=24