Find the area of the following in hectares.
1. 6 rectangles each with an area of 8000000cm2
2. A triangular arena with base 1200 m and height 0.9 km.
3. A rectangular strip of runway of length 3.5km and width 50m
1. 6 rectangles each with an area of 8000000cm2
2. A triangular arena with base 1200 m and height 0.9 km.
3. A rectangular strip of runway of length 3.5km and width 50m
-
sol'n:
1.
A = 8,000,000cm² * (1m/100cm)² * (1 hectare/10,000m²)
A = 2/25 hectares
Total Area = 2/25 * 6
Total Area = 12/25 hectares = 0.48 hectares
2.
9 km * (1,000m/1km) = 9,000m
A = base * height = 1,200m * 9,000m
A = 10,800,000 m²
or
A = 10,800,000 m² * (1km/1,000m)²
A = 54/5 km² = 10.80 km²
3.
3.5km * (1,000m/1km) = 3,500 m
A = length * width = 3,500m * 50m
A = 175,000 m²
or
A = 175,000 m² * (1km/1,000m)²
A = 7/40 km² = 0.175 km²
1.
A = 8,000,000cm² * (1m/100cm)² * (1 hectare/10,000m²)
A = 2/25 hectares
Total Area = 2/25 * 6
Total Area = 12/25 hectares = 0.48 hectares
2.
9 km * (1,000m/1km) = 9,000m
A = base * height = 1,200m * 9,000m
A = 10,800,000 m²
or
A = 10,800,000 m² * (1km/1,000m)²
A = 54/5 km² = 10.80 km²
3.
3.5km * (1,000m/1km) = 3,500 m
A = length * width = 3,500m * 50m
A = 175,000 m²
or
A = 175,000 m² * (1km/1,000m)²
A = 7/40 km² = 0.175 km²
-
Helo Dan! I have a correction for #2, I forgot to put (1/2) in the formula, the area should be (1/2)*base*height, the answer is supposedly 5.40 km².. I just recently noticed the error when i reviewed my answer.
Report Abuse