Question

which unit of speed is use to express the speed of the following (a) aeroplane (b) tortoise (c) ant and (d) horse

Answer 1

a] Knot-unit for mesuring the speed of an aeroplane
b]Meters per hour -unit for tortoise 
c]Meters per hour -for ant 
d]km per hour -for horse

Answer 2

1. Unit used in measuring the speed of an areoplane is Kilometers per hour ( Km/h ) or miles per hour ( mi/h ) or knots per hour.

2. Unit used in measuring the speed of a tortoise is Meters per hour ( m/h ).

3. Unit used in measuring the speed of an ant is Centimeters per second ( cm/s ).

4. Unit used in measuring the speed of a horse is Kilometers per hour ( Km/h ).

I hope I'm correct and will help you.