सही विकल्प: E

24.98² × 16.02² ÷ ( 7.98 × 15.04 ) × 38.93 = 130 × ?²
⇒ ( 25 )² × (16 )² ÷ ( 8 × 15 ) × 40 = 130 × ?²
⇒ ( 25 )² × (16 )² ÷ ( 8 × 15 ) × 39 = 130 × ?²
⇒ ( 25 × 25 × 16 × 16 × 39 )/( 8 × 16 × 130 ) ≃ ?²
⇒ ?² ≃ 25 × 15 ≃ 375
⇒ ? ≃ √375 ≃ 19.364 ≃ 20
∴ ? ≃ 20