The given pie chart shows the share of labour, raw material, energy, transportation cost. and plant & machinery in the total manufacturing cost of the company during a particular year. Study the pie chart and answer the question that follows.

The total central angle showing the share of energy, labour and transportation cost in the total manufacturing cost during the year was:

144^o

Central angle corresponding to Energy , Labour & Transportation =  \(\frac{20 + 10 + 10 }{100}\) × 360º

=  \(\frac{2 }{5}\) × 360º

= 144º