SOLUTION: A 6m wide path runs around the inside of a rectangular lawn, whose length is 110m and breath 80m. fid hte area of the path.If the cost of laying grass in a 1m square lawn is Rs 7.5

Algebra ->  Surface-area -> SOLUTION: A 6m wide path runs around the inside of a rectangular lawn, whose length is 110m and breath 80m. fid hte area of the path.If the cost of laying grass in a 1m square lawn is Rs 7.5      Log On


   

Question 723768: A 6m wide path runs around the inside of a rectangular lawn, whose length is 110m and breath 80m. fid hte area of the path.If the cost of laying grass in a 1m square lawn is Rs 7.50, find the cost of laying grass in a lawn
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Basic question is, how many square meters is the walkway path on the inside?

The still-exposed lawn area will be %28110-2%2A6%29%2880-2%2A6%29.
The sum of pathway around and the exposed lawn area will be 110%2A80.
The area of just the pathway around the lawn is highlight%28110%2A80-%28110-2%2A6%29%2880-2%2A6%29%29 m^2.

That area is 110%2A80-%28110-12%29%2880-12%29
=8800-%2898%29%2868%29
=8800-6664
=highlight%282136%29 m^2

To find the cost of this walkway path is only now a matter of using the given ratio to compute.