Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ ¹ ² ³ °
 

You are not logged in. #1 20050405 01:35:06
yet another problemA cylindrical tunnel 5.5m in diameter is driven through a mountain for a distance of 7km. the ezcavated earth i s spread to a depth of 50cm on the surface of a road 11m wide. Calculate the number of ilometers of the road that can be covered with all of the excavated earth. (Take pi as 22/7) #2 20050405 07:50:39
Re: yet another problemThese are nice problems ... "The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  Leon M. Lederman #4 20050421 04:49:29
Re: yet another problemTotal excavated earth: Pi*5.5m squared*7km=665500 cubic metres (Taking Pi as 22/7) 