Question : A man travels 50 km at 25 km/hr, the next 40 km at 20 km/hr, and then 90 km at 15 km/hr. His average speed is:
Option 1: 18 km/hr
Option 2: 25 km/hr
Option 3: 20 km/hr
Option 4: 15 km/hr
Latest: SSC CGL preparation tips to crack the exam
Don't Miss: SSC CGL complete guide
New: Unlock 10% OFF on PTE Academic. Use Code: 'C360SPL10'
Correct Answer: 18 km/hr
Solution : Given: A man travels the first 50 km at 25 km/hr, the next 40 km at 20 km/hr and the last 90 km at 15 km/hr. Time taken to travel 50 km = $\frac{50}{25}$ = 2 hours Time taken to travel 40 km = $\frac{40}{20}$ = 2 hours Time taken to travel 90 km = $\frac{90}{15}$ = 6 hours Total distance = (50 + 40 + 90) = 180 km Total time = (2 + 2 + 6) = 10 hours Average speed $=\frac{\text{Total distance}}{\text{Total time}}=\frac{180}{10}=$ 18 km/hr Hence, the correct answer is 18 km/hr.
Candidates can download this ebook to know all about SSC CGL.
Answer Key | Eligibility | Application | Selection Process | Preparation Tips | Result | Admit Card
Question : A boy rides his bicycle 10 km at an average speed of 12 km/hr and again travels 12 km at an average speed of 10 km/hr. His average speed for the entire trip is approximately:
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 : Directions: The distance between the two cities is 30 km. A man goes at a speed of 30 km per hour and returns at 20 km per hour. What is his average speed?
Question : An athlete runs an 800 m race in 96 seconds. His speed (in km/hr) is:
Question : John drives 250 km at 50 km/hr and then 350 km at 70 km/hr. Find his average speed for the whole journey in km/hr.
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile