Given that 1² + 2² + 3² +....+ 10² =

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Given that 1² + 2² + 3² +....+ 10² = 385, the value of 2² + 4² + 6² +....+ 20² =

1. 770
2. 1540
3. 1155
4. (385)²

Correct Option: B

Given that , 1² + 2² + 3² +......+ 10² = 385 ......( 1 )
∴ 2² + 4² + 6² + .... + 20² = 2² (1² + 2² + 3² + ..... + 10²)
2² + 4² + 6² + .... + 20² = 4 × 385 = 1540 { ∴ Using ( 1 ) }