Multiple choice general knowledge math & puzzles

A snake slides through a long cylindrical hole in the ground at 5 centimeters per second. The hole is 7.25 meters in length. The snake takes 13 seconds to enter the hole. What is the length in centimeters of the snake ?

  1. 75

  2. 85

  3. 65

  4. 45

  5. 35

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hole length = 7.25 m = 725 cm. Time to enter = 13 seconds. Snake covers 725 cm in 13 seconds at 5 cm/sec. During this time, snake's tail enters hole. Snake length = 725 - (5×13) = 725 - 65 = 65 cm. The tail enters just as head reaches end.