Question
The speed of a boat in still water is 10 km/hr. It
covers (upstream) a distance of 42 km in 8 hours. The speed (in km/hr) of the stream isSolution
Upstream speed of boat = Distance/Time = 42/8 = 21/4 = 5.25 km/hr Therefore, speed of current = 10 – 5.25 = 4.75 km/hr
I. 4x2 + 3√7 x-7 =0
II. 7y2 + 4√7 y-5=0
Solve the given two equations and answer the two questions that follow as per the instructions given below.
I. (1/4) + 7.5p(-2) = 3.62...
I. 6x2 - 41x+13=0
II. 2y2 - 19y+42=0
Equation 1: 2x2Â - 21x + 54 = 0
Equation 2: 4y2Â - 23y + 15 = 0
Difference between the roots of equation 1 is approx...
I. 25p + 2(2p2 – 1) = 8(p + 5)
II. 8q2 + 35q – 78 = 0
I. x2 - 11x + 24 = 0
II. y² - 5y + 6 = 0
If the roots of the quadratic equation 6m² + 7m + 8 = 0 are α and β, then what is the value of [(1/α) + (1/β)]?
I. 14p² + 9p - 8 = 0
II. 4q² - 19q + 12 = 0
I. 20y² - 13y + 2 = 0
II. 6x² - 25x + 14 = 0
I. 6x² - 13 x + 6 = 0
II. 15 y² + 11 y - 12 = 0
