It is given in the question that
On a photograph of a triangular piece of land, the lengths of the three sides are 6 cm, 8 cm, and 9 cm, respectively. the shortest side of the actual piece of land is 540 m long.
6 cm is representing 540 m . THerefore 1 cm is representing 90 m.
And hence 8cm and 9 cm represents,8 times 90 and 9 times 90, that is,
720m and 810 m respectively
So the other two sides are 720 m and 810 m .
