Question : Ram travels with speeds of 15 km/hr, 10km/hr, and 12 km/hr for three equal distances. What is his average speed if the total distance travelled by him is 180 km?
Option 1: 15 km/hr
Option 2: 18 km/hr
Option 3: 20 km/hr
Option 4: 12 km/hr
New: SSC MTS 2024 Application Form OUT; Direct Link
Don't Miss: Month-wise Current Affairs | Upcoming Government Exams
New: Unlock 10% OFF on PTE Academic. Use Code: 'C360SPL10'
Correct Answer: 12 km/hr
Solution : Given: Ram travels with speeds of 15 km/hr, 10km/hr and 12 km/hr for three equal distances. The total distance travelled by him is 180 km. So, he travels first $\frac{180}{3}$ = 60 km with 15 km/hr, next 60 km with 10 km/hr and the last 60 km with 12 km/hr speed. The time taken for the first 60 km = $\frac{60}{15}$ = 4 hours The time taken for the next 60 km = $\frac{60}{10}$ = 6 hours The time taken for the last 60 km = $\frac{60}{12}$ = 5 hours So, the average speed = $\frac{\text{Total distance}}{\text{Total time}}$ = $\frac{180}{4+6+5}$ = $\frac{180}{15}$ = 12 km/hr Hence, the correct answer is 12 km/hr.
Application | Cutoff | Selection Process | Preparation Tips | Eligibility | Exam Pattern | Admit Card
Question : Find the average speed of a boy if he walks $\frac{1}{6}$th distance with a speed of 5 km/hr and rides a bike to cover the remaining distance at a speed of 25 km/hr. The total distance is 60 km.
Question : While going to the office, Sneha travels at a speed of 10 km/hr and on her way back, she travels at a speed of 15 km/hr. What is her average speed for the whole journey?
Question : A man covers half part of a certain distance at 60 km/hr. He covers 40% of the remaining distance at the speed of 12 km/hr and covers the rest of the distance at the speed of 18 km/hr. What is his average speed for the entire journey?
Question : A man covers half part of a certain distance at 15 km/hr. He covers 40 percent of the remaining distance at the speed of 12 km/hr and covers the rest of the distance at the speed of 21 km/hr. What is his average speed for the entire journey?
Question : Dinesh makes four trips of equal distances. His speed on the first trip was 140 km/hr and in each subsequent trip, his speed was half of the previous trip. What is the average speed of Dinesh in these four trips?
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile