102+62+82 ⇒4π×102=4π×62+4π×82 ∴ Surface area of sphere C = Surface area of sphere A + Surface area of sphere B Hence, statement 1 is correct. 123=63+83+103 ⇒
4
3
π×123 ⇒=
4
3
π×63+
4
3
π×83+
4
3
π×103 ∴ Volume of sphere D = Volume of sphere A + Volume of sphere B + Volume of sphere C Hence, statement 2 is correct