Question

I need answer for 8th question

Answer 1

I. 0.25 km/min
II. 250m/min
III. 4.1m/s
IV. 15km/hr

Answer 2

i) v=5/20= 1/4
ii) v= 5000/20= 250
iii) v= 5*5/18*20= 0.069
iv) v= 5/0.3=16.67