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Given that (1^2+2^2+3^2+ ..20^2)=2870 ,\...

Given that `(1^2+2^2+3^2+ ..20^2)=2870 ,\ ` the value of `(2^2+4^2+6^2+dot+40^2)i s` 2870 (b) 5740 (c) 11480 (d) 28700

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