Subject: General Aptitude · Chapter: Time and Distance · Exam: · Marks: · Difficulty:
A carriage driving in a fog passed a man who was walking at the rate of 3 kmph in the same direction. He could see the carriage for 4 minutes and it was visible to him upto a distance of 100 m. What was the speed of the carriage?
Answer
Answer (as printed):
Explanation
Let the speed of the carriage be x kmph. Then, relative speed = (x – 3) kmph. 1 1 Distance covered in 4 min i.e., hr at relative speed = 100 m = km. 15 10 1 3 3 9 1 \ (x – 3) = × 15 = ⇔ x = 3 + = = 4 . 10 2 2 2 2 1 Hence, speed of the carriage = 4 kmph. 2 3
Explanation as extracted from the printed page; notation may be imperfect.