Question
Find the total time taken by boat C to cover the entire
journey?Solution
Speed of boat C in still water = 15 km/hr Speed of stream = 3 km/hr Upstream speed = 12 km/hr Downstream speed = 18 km/hr Let, total time taken by boat C for the entire journey = 19t hours So, according to the question Time taken to travel upstream = 10t hours Time taken to travel downstream = 9t hours Let, a kms and b kms be the distance travelled by boat C upstream and downstream respectively. = 10t hours …(1) hours …(2) From equation 1 and 2, we get, a:b = 20:27 Total distance travelled by boat C = 141 kms So, upstream distance = 60 kms, and downstream distance = 81 kms Upstream time = = 5 hours Downstream time = = 4.5 hours Total time = 5 + 4.5 = 9.5 hours Hence, option 4 is the correct answer.
Equation 1: x² - 45x + 500 = 0
Equation 2: y² - 60y + 600 = 0
I. x² - 208 = 233
II. y² + 47 - 371 = 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) p2+p=56 Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
II) q2-17q+72=0
...In each of these questions, two equations (I) and (II) are given.You have to solve both the equations and give answer Â
I. 3x² –7x + 4 = 0�...
I. x2 + 24x + 143 = 0
II. y2 + 12y + 35 = 0
I. 195x² - 46x - 21 = 0
II. 209y² + 13y - 12 = 0
Solve the quadratic equations and determine the relation between x and y:
Equation 1: x² - 24x + 143 = 0
Equation 2: y² - 26y + 165 = 0
I. 5x² = 19x – 12
II. 5y² + 11y = 12
I. 5x2 – 18x + 16 = 0
II. 3y2 – 35y - 52 = 0
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