5 Views

Question : Kartik takes 4 hours to travel from place X to place Y at the speed of 80 km/hr. He takes 1 hour to travel from place Y to place Z with 80% increased speed. What is the average speed from Place X to Z for the complete Journey?

Option 1: 82.6 km/hr

Option 2: 90.8 km/hr

Option 3: 92.8 km/hr

Option 4: 88.6 km/hr


Team Careers360 25th Jan, 2024
Answer (1)
Team Careers360 26th Jan, 2024

Correct Answer: 92.8 km/hr


Solution : Time to travel from place X to place Y = 4 hours
Speed when travelling from place X to place Y = 80 km/hr
Distance from place X to place Y = 4 × 80 = 320 km
Time to travel from place Y to place Z = 1 hour
Speed when travelling from place Y to place Z = 80 × 180% = 144 km/hr
Distance from place Y to place Z = 144 × 1 = 144 km
Average speed = $\frac{\text{total distance}}{\text{total time}}$ = $\frac{320+144}{4+1}$ = $\frac{464}{5}$ = 92.8 km/hr
Hence, the correct answer is 92.8 km/hr.

Know More About

Related Questions

TOEFL ® Registrations 2024
Apply
Accepted by more than 11,000 universities in over 150 countries worldwide
Manipal Online M.Com Admissions
Apply
Apply for Online M.Com from Manipal University
View All Application Forms

Download the Careers360 App on your Android phone

Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile

150M+ Students
30,000+ Colleges
500+ Exams
1500+ E-books