Three sides of a triangular field are of length 15 m, 20

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Three sides of a triangular field are of length 15 m, 20 m and 25 m long respectively. Find the cost of sowing seeds in the field at the rate of 5 rupees per sq.m.

1. $ 300
2. $ 600
3. $ 750
4. $ 150

Correct Option: C

15² + 20²= 25²
∴ The triangular field is right angled.

=	1	× 15 × 20
	2

= 150 sq. metre
Hence, Cost of sowing seeds = 150 × 5 = $ 750