Question : Reshma covers 45 km at a speed of 15 km/hr by bicycle, 80 km at a speed of 40 km/hr by car, and another 6 km at a speed of 2 km/hr on foot. Find her average speed for the whole journey (correct to 2 decimal places).
Option 1: 16.38 km/hr
Option 2: 43.50 km/hr
Option 3: 18.36 km/hr
Option 4: 15.25 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: 16.38 km/hr
Solution : Reshma covers 45 km at a speed of 15 km/hr by bicycle, 80 km at a speed of 40 km/hr by car, and another 6 km at a speed of 2 km/hr on foot. $\text{Average speed}=\frac{\text{Total distance}}{{\text{Total time}}}$ ⇒ $\text{Average speed}=\frac{45+80+6}{\frac{45}{15}+\frac{80}{40}+\frac{6}{2}}=\frac{131}{3+2+3}=\frac{131}{8}=16.38$ km/hr Hence, the correct answer is 16.38 km/hr.
Candidates can download this ebook to know all about SSC CGL.
Admit Card | Eligibility | Application | Selection Process | Preparation Tips | Result | Answer Key
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?
Question : Ramesh, on his way to his hometown, travelled the first 250 km at a speed of 75 km/hr and the next 250 km at a speed of 85 km/hr. Find the average speed for the whole journey (correct to 2 decimal places).
Question : A car covers a certain distance in 25 hours. If it reduces the speed by $\frac{1}{5}$th, the car covers 200 km less in that time. The speed of the car is:
Question : A car covers a distance of 350 km in 5 hours and covers another 450 km at a speed of 90 km/hr. What is the average speed (in km/hr) of the car?
Question : A car can finish a certain journey in 10 hours at a speed of 42 km/hr. In order to cover the same distance in 7 hours, the speed of the car (km/hr) must be increased by:
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile