Question
Two cars X and Y start from two places A and B
respectively which are 700 km apart at 9 a.m. Both the cars run at an average speed of 60 km/hr towards each other. Car X stops at 10 a.m. and again starts at 11 a.m. While the other car Y continues to run without stopping. When do the two cars cross each other?Solution
Till 11 a.m. Dist. Covered by X = 60 km and Till 11 a.m. Dist. Covered by Y = 120 km Remaining distance to be covered at 11 a.m. = 700 – 180 = 520 km Relative speed of X and Y = 120 Km / hr ∴ Time taken = 520/120 =13/3 hrs. =  4 hrs. 20 min. ∴ Two cars will cross each other at 3.20 p.m.
Quantity I: A vessel contains a mixture of milk and water in the ratio of 7 : 5. If 9 litre of mixture is sold and replaced by same amount of water then...
I. 2x² + 15 x - 27 = 0
II. 3 y² + 25 y - 18 = 0
I. 4p² + 17p + 15 = 0
II. 3q² + 19q + 28 = 0
Solve the quadratic equations and determine the relation between x and y:
Equation 1: x² - 32x + 207 = 0
Equation 2: y² - 51y + 648 = 0
I. x2 + (9x/2) + (7/2) = - (3/2)
II. y2 + 16y + 63 = 0
I.70x² - 143x + 72 = 0
II. 80 y² - 142y + 63 = 0
I. x2 – 13x + 40 = 0
II. 2y2 – 15y + 13 = 0Â
I. 7x² + 27x + 18 = 0
II. 19y² - 27y + 8 = 0
In the question, two equations I and II are given. You have to solve both the equations to establish the correct relation between 'p' and 'q' and choose...
l. x2 - 16x + 64 = 0
II. y2Â = 64
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