Upstream speed = 245/7 = 35 km/h Downstream speed = 450/10 = 45 km/h Speed of boat in still water = (35 + 45)/2 = 40 km/h Speed of stream = (45 – 35)/2 = 5 km/h Increased speed of boat in still water = 40 + 5 = 45 km/h Decreased speed of stream = 5 – 2 = 3 km/h Required time taken = 533/(45 – 3) + 329/(45 + 3) = 13 + 7 = 20 hours
If x - √3 y = 8 Find the slope in angle?
If, x - y radic; 3 = 23 and radic; 3x + y = 35
Find the angle between both the lines when they intersect each other.
...I. p2 – 5p + 6 = 0
II. 36q2 = 81
...If in two linear equations ax + by = c and dx + ey = f and a/d = b/e = c/f then, which of the following is true about the two equations?
The ratio of roots of an equation
ax²+bx+b = 0 is p : q
Then find, √p/√q + √q/√p + √p/√q ?
I. 2p2 + 5p + 2 = 0 II. 2q2 + 11 q + 14 = 0
I. p² - 365 = 364
II. q - √ 529 = √ 169
For which value of m, there is no solution to the equation -
a – b = 5
ma – 4b = 1
Find the area between the lines 18x +12y = 108, 9x + 6y = 27, x - axis and y -axis.
If x-y√3 = 15 and √3 x+y = 23
Find the angle between both the lines when they intersect each other?
