Bequeathed 7803

The father bequeathed to his two sons 4 gold plates in the shape of a square, which were 1 mm thick. The side lengths of these plates were 5 cm, 10 cm, 10 cm, and 15 cm. The sons were to receive the same amount of gold. How many gold plates did each son receive?

Correct answer:

a =  3
b =  1

Step-by-step explanation:

S1=52=25 cm2 S2=102=100 cm2 S3=S2=100 cm2 S4=152=225 cm2  A=S1+S2+S3=25+100+100=225 cm2 a=3
B=S4=225 cm2 A=B  b=1

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