Area of PQRS = l x b = 700 × 300
= 2,10,000 sq m
Area of cross Roads = Area of KLMN abcd – 1, 2, 3, 4
= 300 × 10 + 700 × 10 – 10 × 10
= 3000 + 7000 – 100
= 10,000 – 100 = 9,900 sq mts
Area of the park excluding the cross roads = 2,10,000 – 9,900
= 2,00,100 sq mts.
Area in hectares = \(\frac{2,00,100}{10,000}\) = 20.01 hectares