Question
A boat covers a distance of 338
km upstream in 13 hours. After rain, the speed of the stream increases by 50%, and the speed of the boat in still water decreases by 25% due to low visibility. Following this, the boat takes 7 hours to travel 294 km downstream. Determine the difference between the speed of the boat in still water after the rain and the speed of the stream after the rain.Solution
ATQ, Let the speed of boat in still water before rain be x km/h. And, the speed of stream before rain be y km/h. So, the upstream speed before rain = (x – y) = 338 ÷ 13 x – y = 26 ------(i) Speed of boat in still water after rain = 0.75x km/h Speed of stream after rain = 1.5 y km/h Downstream speed of boat after rain = 0.75x + 1.5y = 294 ÷ 7 0.75x + 1.5y = 42 -------(ii) On solving (i) and (ii), we get x = 36 km/h and y = 10 km/h So, the speed of boat in still water after rain = 0.75 × 36 = 27 km/h Speed of stream after rain = 1.5 × 10 = 15 km/h Required difference = 27 – 15 = 12 km/h
In August 2021, Indonesia suspended (A) coal exports from 34 coal mining (B) companies it said failed (C) to meet domestic market obligasions (D) betwe...
Select the most appropriate meaning of the given idiom.
Pipe dream
Time perception raises a number of ______ puzzles, including what it means to say we perceive time.
Lateral thinking method is ______ with creation of new ideas that is a procedure and readiness to look at things in a diverse approach.
Handle this glass table with care because it is ______
The lady I met in the restaurant today was a pure sole (A) / soul (B).
We came from a totally different root (A)/ route (B) today.
...The theoretical framework is finished by identifying indicators to be used in the ______ of the success of such policies.
Select the most appropriate word for the given group of words.
a written work dealing formally and systematically with a single specialized subject.
My love for makeup (remain) untarnished.
Select the most appropriate option to substitute the underlined segment in the given sentence. If no substitution is required, select ‘No substitu...
Relevant for Exams:
