Question

A triangular park in a city has dimensions 100m 90m 110m. a contract is given to a company for planting grass in the park at the rate of rs. 4000 per hectare. find the amount to be paid to the company

Answer 1

first use heron's formula ,it will be
$2 \sqrt{3600}$
then take square root it will be 54.5 and multiply it by 4000 then answer will be 436000