Subject: General Aptitude · Chapter: Time and Distance · Exam: · Marks: · Difficulty:
While covering a distance of 24 km, a man noticed that after walking for 1 hour and 40 minutes, the distance 5 covered by him was of the remaining distance. What was his speed in metres per second? 7
Answer
Answer (as printed):
Explanation
Let the speed be x km / hr. 2 5x Then, distance covered in 1 hr. 40 min. i.e., 1 hrs = km. 3 3 5x Remaining distance = 24 − 3 km. 5x 5 5x 5x 5 72 − 5 x ∴ = 24 − ⇔ = ⇔ 7 x = 72 − 5 x 3 7 3 3 7 3 ⇔ 12x = 72 ⇔ x = 6. 5 5 2 Hence, speed = 6 km/hr = 6 × m/sec = m/sec = 1 m/sec. 18 3 3
Explanation as extracted from the printed page; notation may be imperfect.