4 hours (goose) and 10 hours (heron)
I believe the man who discovered it was Heron (or Hero) of Alexandria.
HERON discovered the area of a triangle in terms of its sides. Heron's formula = [s(s-a)(s-b)(s-c)]1/2Here, s = semiperimeter of a triangle a, b, c = three sides of the triangle
If A is the area of a triangle with side length a, b and c and s is (a+b+c)/2 ( known as the semiperimeter of the triangle) Then, Heron's formula tells us that A=square root of [s(s-a)(s-b)(s-c)].
The heron is traveling 1 meter per second. The duck is traveling 12 meters per second. The duck is traveling faster.
Hanuman Singh was born in 1950.
Hanuman Prasad Poddar was born in 1892.
Guru Hanuman was born on 1930-03-15.
George Heron was born in 1919.
Francis Heron was born in 1853.
E.T. Heron was born in 1867.
Jack Heron was born in 1948.
Eddie Heron was born in 1910.
Clint Heron was born in 1979.
Red Heron was born in 1917.
Oscar Heron was born in 1898.
Alastair Heron was born in 1915.