Question

A right angled triangle of sides 30 cm 72cm and 78cm is used for an adcertisement by a company . How much compny will pay for it at the rate of rupes40 per cm2

Answer 1

Answer:

Correct option is

C

30 m

s=

2

30+72+78

=

2

180

=90

∴ Area of Δ=

90(90−30)(90−72)(90−78)m

2

=

90×60×18×12m

2

=1080m

2

Area of the Δ with bae ( 72 m)

=

2

1

×72×altitude=1080

∴ Required length of altitude =

72

1080×2

=30m