Question

Find the area in hectares of a maize field whose measurements are shown in the field book below. The baseline PQ is 300m long. 

	Q
	250	70B
C100	180
	80	150A
	P

Answer 1

Area of A = ½ × 80 × 150 = 6000m²
Area of figure B = ½(70+150) × 170 = 18700m²
Area of C = ½ × 50 × 70 = 1750m²
Area of D = ½ × 300 × 100 = 15000m²
Total Area = 15000+6000+1750+18700
                = 41450m² =4.145ha
                    10000