Question

z\Find the area of triangular field ,the length of whose side are 275m,600m and 715m.what is the the cost of cultivating the field at the rate of rs 200 per hector

Answer 1

USING HERONS FORMULA
S= 600+275+715/2 = 1590/2 = 795
AREA= √S (S-A)(S-B)(S-C) = √795 X (795-600)(795-275)(795-715)
= √795X195X520X80 = √ 3X5X53X5X3X13X5X2X2X2X2X13X2X2X2X5
= 1560√5X2X53  = 80305.9151

COST OF CULTIVATING = 80305.9 X 200 / 10000 = RS.1606.11

HOPE THIS HELPS.