Question
A boat, whose speed in still water is 25% more than the
speed of the current, covers 810 km downstream in _____ hours. The speed of the boat in still water is ______ km. The values given in which of the following options will fill the blanks in the same order in which is it given to make the statement true: I. 20, 24 II. 10, 45 III. 30, 15Solution
Let, the speed of the current be x km/hr Therefore, speed of the boat in still water = 1.25x km/hr Downstream speed of the boat = x + 1.25x = 2.25x km/hr For I: 2.25x = 810/20 => x = 40.5 => x = 18 Therefore, speed of boat in still water = 1.25x = 22.5 km/hr Therefore, I is false. For II: 2.25x = 810/10 => 2.25x = 81 => x = 36 Therefore, speed of boat in still water = 1.25x = 45 km/hr Therefore, II is true. For III: 2.25x = 810/30 => 2.25x = 27 => x = 12 Therefore, speed of the boat in still water = 1.25x = 15 km/hr Therefore, III is true.
What technology is utilized by FASTag to facilitate automatic toll payments?
Which of the following cube in the answer figure CANNOT be made based on the unfolded cube in the question figure?
The first Chairman of Finance commission was
Which statement among the following is incorrect regarding the geographical description of Uttarakhand?
RBI Banking Ombudsman Office for Centralised Receipt and Processing Centre is located in ____________.
Who is the author of the book The Golden House?
Consider the following statements:
1. The design of the National Flag was adopted by the Constituent Assembly of India on 22 July 1947.
2....
When is International Labour Day observed?
ऊंट की खाल पर चित्रांकन किस कला शैली की विषेषता है?
Recently Supreme Court approved establishment of some special courts to prosecute criminal cases against legislators within a year. The number of courts...
Relevant for Exams:
