Subject: General Aptitude · Chapter: Time and Distance · Exam: 2008 · Marks: · Difficulty:
A trip to a destination is made in the following way : 900 km by train at an average speed of 60 km/hr, 3000 km by plane at an average speed of 500 km/hr, 400 km by boat at an average speed of 25 km/hr, 15 km by taxi at an average speed of 45 km/hr. What is the average speed for the entire journey?
Answer
Answer (as printed):
Explanation
Total distance travelled = (900 + 3000 + 400 + 15) km = 4315 km. 900 3000 400 15 Total time taken = + + + hr 60 500 25 45 1 1 112 = 15 + 6 + 16 + hr = 37 hr = hr. 3 3 3 \ Average speed for the whole journey 3 65 = 4315 × km/hr = 115 km/hr. 112 112
Explanation as extracted from the printed page; notation may be imperfect.