Question

Find the cost of levelling a ground in the
form of a triangle with sides 16, 12,20m
at Rs. 4 per sq. meter​

Answer 1

Answer:₹640

Step-by-step explanation:

Area of triangle = 1/2 × 16 ×20

= 160 sq. m or 160 m^2

Cost of leveling = 160 × 4

= ₹640

Answer 2

Answer: Cost is 384 rupees

Step-by-step explanation:

Let a=12m, b=16m and c=20m

s=(12+16+20)/2

s=48/2

s=24m

Now, s(s-a)(s-b)(s-c)=24*(24-12)*(24-16)*(24-20)

=24*12*8*4

=288*32=9216

Area of the triangle=√9216=96m²

Cost of levelling per m²=4 rupees

Cost of levelling for 96 m²=96*4=384 rupees