Question

Each mile of railway track required b/w 1,760 & 2,000 sleepers. if one average sized tree yields 3 to 5 sleepers for a 3 metre wide broad gauge track, calculate approximately how many trees would have to be cut to lay one mile of track.

Answer 1

Average number of sleepers required per mile
=   1760 + 2000/2
= 1880 sleepers  

Average number of sleepers obtained from one tree
= 4
approximate number of trees to be cut
=1880/4
= 470 trees.                                                                                                                     

Answer 2

Answer:

470 trees.

Explanation:

Average number of sleepers required for each mile of railway track:

=> 1760 + 2000/2

=> 3760/2

=> 1880 sleepers.

Average number of trees required for 3 metre wide broad gauge track:

=> 3 + 5/2

=> 8/2

=> 4 sleepers.

Approximate number of trees would have to be cut to lay one mile of track:

=> 1880/4

=> 470 sleepers.