Method 1: Let AB = a AC = a BC = 20-2a Angle A = 120 Cos 30 = (20-2a)/a √3/2 = 20-2a/a a√3 = 40-4a a( √3 +4) = 40 a = 40/(√3+4) Method 2: A = b/√3 B(2+√3)...
The length of road per 100 sq km of area is known as density of roads. Advantages of roadways over railways are: (i) Construction cost of roads is much lower than railway lines. (ii) Roads can be constructed...