Question

The edges of a triangular board are 6 cm, 8 cm and 10 cm. What will be the cost of painting at the rate of 70 paise per cm square is :​

Answer 1

Answer:

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Answer 2

Answer:

₹ 168

Step-by-step explanation:

Because all side are different so it is scalen triangle

area = √s×(s-a)+(s-b)+(s-c)

S = 10+6+8/2

= 24/2

=12 cm

now substitute s = 12 in above formulae

area = √12×(12-a)+(12-b)+(12-c)

now put value of

a=6

b=8

c=10

we get

area = √12×(12-6)+(12-8)+(12-10)

= √12×6×4×2

= √576

= 24 cm²

cost of painting at the rate of 70 paise per cm square is

= 24×70

= ₹ 168