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Let the speed of boat in still water =B and speed of stream =S Speed of boat in upstream =B-S=13×60/52 =15km/h S=3km/h B=18km/h Speed of boat in downstream =B+S=21km/h Take time cover 40km in downstream =40/21 =1(19/21)
I. 2x² - 15x + 27 = 0
II. 2y² - 13y + 20 = 0
I. 3p² - 11p + 10 = 0
II. 2q² + 13q + 21 = 0
Solve the quadratic equations and determine the relation between x and y:
Equation 1: 97x² - 436x + 339 = 0
Equation 2: 103y² - 460y + 357 = 0
I. 3p² + 13p + 14 = 0
II. 8q² + 26q + 21 = 0
I. 35x² + 83x + 36 = 0
II. 42y² + 53y + 15 = 0
Solve the quadratic equations and determine the relation between x and y:
Equation 1: 4x² - 12x + 9 = 0
Equation 2: 2y² + 10y + 12 = 0
I. (x13/5 ÷7) = 5488 ÷ x7/5
I. 20y² - 13y + 2 = 0
II. 6x² - 25x + 14 = 0
I. 6x2- 41x+13=0
II. 2y2- 19y+42=0
How many values of x and y satisfy the equation 2x + 4y = 8 & 3x + 6y = 10.
