The cost of leveling a triangular piece of land whose sides are 72 m. 30 m and 78 in respectively at the rate of 20 paisa per square metre is:
Since $$78 = \sqrt{72^2+30^2}$$
So it is a right angled triangle.
Area $$=\frac{1}{2}\times 72\times 30 = 1080 m^2$$
Cost of leveling $$= ₹ 0.2\times 1080 =₹ 216$$
Option C is correct.
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