Question
The base of a triangular field is 400 metres and its
height 250 metres. Find the area of the field and also calculate the charges for supplying water to the field at the rate of Rs.15 per sq. hectare?Solution
Area = 1/2 ×  base ×  height = 1/2 ×  400 ×  250 = 50,000 m2 ∴ Cost = Rate x Area = (15 × 50000)/10000 = Rs.75 (one hectare= 10,000 m2 )  Â
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