Question
Time taken by a boat to cover 180 km in downstream is
the same as to cover 140 km in upstream. Find the time taken by the boat to cover 360 km in downstream, if the speed of the boat in still water is 40 km/h.Solution
ATQ, Let the speed of the stream be 'x' km/h. ATQ: We know that, Downstream speed of a boat = Speed of the boat in still water + speed of the stream Upstream speed of a boat = Speed of the boat in still water - speed of the stream 
9(40−x) = 7(40+x) 360−9x = 280+7x 16x = 80 x = 80/16 x = 5 Therefore, speed of the stream = 5 km/h Therefore, time taken to cover 360 km in downstream = 360/(40+5) = 360/45 = 8 hrs
In the question below, two statements (I) and (II) are given. These statements may be either independent causes or may be effects of independent causes...
Statements:
1.The government reduced the interest rates on home loans.
2. There has been a significant rise in the purchase of new houses.
In each of the following questions, two statements numbered I and II are given. There may be cause and effect relationship between the two statements. ...
In each of the following questions, two statements numbered I and II are given. There may be cause and effect relationship between the two statements. ...
Statement: The Ministry of Civil Aviation has proposed amendments to the Civil Aviation Requirements to establish a National No-Fly List and quantify p...
Statements:
I. Sports class have been made mandatory for all the standards.
II. Sports helps in both mental and physical fitness.
...To reduce backlog in district courts, a few Indian states have introduced pilot projects that use AI tools to assist judges in case-sorting and bail-re...
In each of the following questions, two statements numbered I and II are given. There may be cause and effect relationship between the two statements....
In each of the following questions, two statements numbered I and II are given. There may be a cause and effect relationship between the two statements....
Statements:
1. Many schools in the city remained closed for a week.
2. The city witnessed heavy flooding due to incessant rains.
Relevant for Exams:
