Math, asked by diyaa3535, 10 months ago

Base and altitude of triangular metal disc are 66 ,28 cm .by drilling circular hole through this metal disc, it's area reduced to one third . Find diameter of hole ( take only one side into consideration)

Answers

Answered by haridasan85
8

Answer:

Area of metal disc=66x28/2

=924cm2

1/3 of the area=924/3=308cm2

2/3 of area=616cm2

Area of the hole =616

616= πr^2

r^2 = 616/π = 616x7/22 = 196

r =v196=14

diameter =2r=2x14=28cm. Ans

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