Answers

2014-02-06T20:33:15+05:30
The bottom: a*a*=a²
The side: a*10=10a
10a*4+a²=40a+a²
40a+a²=225 /+400
40a+a²+400=625
(a+20)²=625/√ from both sides
a+20=25
a=5
The length of the side of the base is 5

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