(52.022-34012)÷17.99×?=1720
ক
25
খ
20
গ
400
ঘ
625
সঠিক উত্তর: 400
Let, ? = x ∴ (52.022 - 34.012) ÷17.99×x = 1720⇒(522 - 342) ÷18 ×x = 1720 ⇒1548 ÷18x = 1720⇒86x = 1720 ⇒x = 20⇒ x = 400 .'. x = 400