Right-angled 66364

From a rectangular board with 2 m and 3 m dimensions, we cut isosceles and right-angled triangles at the corners with an overhang of 40 cm. Calculate the ratio of the rest of the board's areas to its total original area.

Correct answer:

x =  71:75

Step-by-step explanation:

a=2 m b=3 m t=40 cm m=40:100  m=0.4 m  S1=a b=2 3=6 m2 S2=4 2t t=4 252 52=258=0.32 m2 S3=S1S2=6258=256 25258=25150258=251508=25142=5.68 m2  x=S1S3=625142=75710.9467=71:75

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