Question : A boat goes a certain distance at 30 km/hr and comes back the same distance at 60 km/hr. What is the average speed (in km/hr) for the total journey?
Option 1: 45 km/hr
Option 2: 50 km/hr
Option 3: 40 km/hr
Option 4: 35 km/hr
Latest: SSC CGL Tier 1 Result 2024 Out | SSC CGL preparation tips to crack the exam
Don't Miss: SSC CGL Tier 1 Scorecard 2024 Released | SSC CGL complete guide
Suggested: Month-wise Current Affairs | Upcoming Government Exams
Correct Answer: 40 km/hr
Solution : Given: The speed of the boat is 30 km/hr and 60 km/hr for the same distance. So, average speed = $\frac{2xy}{x+y}$, where $x$ and $y$ are two given speeds of the boat (for the same distance). Putting the values $x$ = 30 and $y$ = 60, we get, $\therefore$ Average speed = $\frac{2×30×60}{30+60}$ = $\frac{3600}{90}$ = 40 km/hr Hence, the correct answer is 40 km/hr.
Candidates can download this ebook to know all about SSC CGL.
Result | Eligibility | Application | Selection Process | Preparation Tips | Admit Card | Answer Key
Question : A car travels a certain distance at 70 km/hr and comes back at 30 km/hr. Find the average speed for the total journey.
Question : If a boat goes upstream at a speed of 21 km/hr and comes back the same distance at 28 km/hr, what is the average speed (in km/hr) for the total journey?
Question : Vikas covered a certain distance by bike. If he covers 40% of the distance at 40 km/hr, 50% of the distance at 25 km/hr and the remaining 10% distance at 10 km/hr. Find his average speed over the whole distance.
Question : A jeep travels to a place 300 km away at an average speed of 60 km/hr and returns at a speed of 30 km/hr. What is the average speed (in km/hr) for the whole journey?
Question : A person covers a certain distance by bus at 45 km/hr and immediately returns to the starting point by car at a speed of 80 km/hr. What is his average speed during the whole journey?
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile