A four bottom 40 cm MB plough has a working depth of 15 cm and draft of 1600 kg. It is working at a speed of 15 cm and draft of 1600 kg. it is working at a speed of 4.5 km/hr with field efficiency of 70%. What will be the drawbar power?
a) 14.9 KW
b) 19.6 KW
c) 18.7 KW
d) 17.6 KW
Answer: b
Explanation: Total furrow cross section = 4*40*15 = 2400 cm2
Unit draft = 1600/2400 = 0.66 kg/cm2
Drawbar power = \(\frac{Draft*speed}{1000} = \frac{1600*9.8*4.5*1000}{1000*60*60}\) = 19.6KW.
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