Isosceles trapezoid

The old father decided to change the top plate of an isosceles-like trapezoid with the basic dimensions of 120 cm and 60 cm, and the shoulder is 50 centimeters long. How much does it pay for a new plate and a square meter worth 17 euros?

Correct answer:

x =  6.12 Eur

Step-by-step explanation:

a=120 cm m=120:100  m=1.2 m c=60 cm m=60:100  m=0.6 m r=50 cm m=50:100  m=0.5 m  h=r2((ca)/2)2=0.52((0.61.2)/2)2=52=0.4 m  S=(a+c) h/2=(1.2+0.6) 0.4/2=259=0.36 m2  x=17 S=17 0.36=6.12 Eur

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