Question
A boat goes downstream at 28 km/hr and upstream at 20
km/hr. If it takes 14 hours to travel (x + y) km upstream when the stream speed is doubled, then what is the average of x and y?Solution
ATQ,
Let, speed of boat in still water and stream speed be B km/hour and s km/hour, respectively.
So, (B + s) = 28 … (i)
Also, (B – s) = 20 … (ii)
Solving equation (i), and (ii), we get,
B = 24 km/hour
s = 4 km/hour
According to question,
(x + y)/(B – 2s) = 14
(x + y) = 14 × (24 – 2 × 4) = 14 × 16 = 224 km
Therefore, average value of x and y = (x + y)/2 = 224/2 = 112 km
Article 323A of the Constitution empowers Parliament to establish:
During re-examination of a witness:
When court is to form an opinion regarding electronic signature then opinion of certifying officer who issued electronic signature is?
A member of an All- India service and civil service of any States holds office __________.
Consider the following statements regarding market definition under the Competition Act:
Statement 1: Market definition is relevant only for asse...
ISO 22000 describes which management system?
Which of the following activities would constitute "organized crime" according to the Bharatiya Nyaya Sanhita, 2023?
What is the term of office for the Chief Information Commissioner, and what is the eligibility condition?
The case of Sawal Das v. State of Bihar is related toÂ
The doctrine of Basic Structure has many components. Which of the following features has NOT been held to be a part of the basic structure by the Suprem...
Relevant for Exams:
