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
What is HS200, recently in news?
Which of the following statements is true regarding the newly discovered species of dartfish?
Recently Shri Nitin Gadkari approves projects worth Rs 573.13 Crore for which of the following two states?
Which of the following has been certified as a ‘Great Place to Work’ for the year 2023?
What significant achievement has the Visakhapatnam Port recently accomplished according to the Container Port Performance Index 2023?
The Confederation of Indian Industry's Business Confidence Index (CII-BCI) rose to a three quarter high of ________ in the second quarter (July-Septembe...
The ‘INSPIRE’ program extends the existing perks, including preferential interest rates, priority banking services, and doorstep banking facilities,...
What is the name of the comprehensive digital platform launched by Dharmendra Pradhan, Union Minister for Education and Skill Development and Entreprene...
Who among the following has/have been honored with “special, posthumous homage” at the Martin Ennals Award in Geneva?
Government has reviewed the Foreign Direct Investment (FDI) policy in the coal mining on 18.09.2019 allowing ____% FDI under automatic route for sale of...
Relevant for Exams:
