A triangular commercial piece of real estate is priced at S

A triangular commercial piece of real estate is priced at S. 16a = $ 12.80 per square foot. The lot measures Cost of Lot $

solution-

you have not provided the sides of the triangle

i am assuming the sides what u have written are correct

a=240

b=312

c=338

now findinng s

s = (a + b + c) / 2

s = (80+312+338) / 2=365

now by heron\'s formula

A = sqrt(s * (s - a) * (s - b) * (s - c))

A = sqrt(365 * (365 - 80) * (365 - 312) * (365 - 338))

A = sqrt(365*285*53*27)

A=638.61

now

price per ft^2=0.16

total price=

(0.16*638.61)=102.1776 $