Question

APPLICATION OF HERON'S FORMULA
A triangular field ABC has sides 120 m, 80 m and 50 m.

(i) A gardener Dhania has to put a fence all around it, leaving a space of 3m wide for a gate on one side. Then the length of fence is,
(a) 250m
(b) 247m
(c) 253m
(d) 245m

(ii) What is the cost of fencing it with barbed wire at the rate of Rs 30/m leaving a space of 3m wide for a gate on one side.
(a) Rs 4910
(h) Rs 7440
(c) R: 7410
(d) Rs 4940

(iii) What is the area of park ABC
(a) 375√15m^2
(b) 375√75m^2
(c) 370√15m^2
(d) 370√75m^/8

(iv) If he wish to plant brinjals in one third area of the park, then howmuch area will be left for planting other crops
(a) 125√15m^2
(b) 250√15m^2
(c) 375√15m^2
(d) 150√15m^2

(v) What is the perimeter of ∆ABC
(a) 250m
(b) 150m
(c) 275m
(d) 200m​

Answer 1

Answer:

1.b-247m

2.c-7410

3.a-375√15m^2

4.b- 250√15m^2

5.a-250