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31). The time taken by a boat to travel a distance downstream is half the time taken by it to travel the same distance upstream. What is the speed of the boat downstream if it travels 7.5 km upstream in 1 hour 30 min ? (in km/hr)
A). 7.5
B). 5
C). 9
D). 10
E). None of these
View Answer
Correct Answer: 10
Time taken by boat in upstream =\( \large 1 \frac{1}{2} = \frac{3}{2}hr \)
Time taken by boat in downstream,\( \large = \frac{3}{2}\times\frac{1}{2} = \frac{3}{4}hr \)
Speed of boat in downstream = \( \large\frac{7.5 \times 4}{3} = 10km/h \)
Directions (32-36) : In these questions, two equations numbered I and II are given. You have to solve both the equations and mark the appropriate option.
Give answer :
(1) \( x \le y \)
(2) \( x \ge y \)
(3) Relationship between X and y cannot be established
(4) x < y
(5) x > y
32). I .\(x^{2} = 144 \)
II. \( y^{2} - 24y + 144 = 0 \)
A). \( x \le y \)
B). \( x \ge y \)
C). Relationship between X and y cannot be established