# Find The Cost of Sowing Seeds in The Field at The Rate of Rs. 5 per sq. m.

Answered

Three sides of a triangle 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 Rs. 5 per sq. m.

- 750
- 150
- 300
- 600

Best answer

**Answer: (1) 750
Explanation:-
**In triangle PQR,

PR

^{2}= PQ

^{2}+ QR

^{2}

25

^{2}= 15

^{2}+ 20

^{2}

625 = 225 + 400

625 = 625

Therefore, the triangular field is right angle at Q.

Then, Area of the field = = PQ x RS/2

= 15 x 20/2

= 150 m

^{2}

Therefore, the cost of showing seed is Rs.5 sq. m

Thus, the cost of sowing seed for 150 m

^{2}= 150 x 5 = Rs.750.