An alloy contains 30 per cent aluminium. What quantity of alloy will have 300 gm of aluminium?
Answer & explanation
Correct answer: option 2
Aluminium is 30% of an alloy.
300 gm aluminium is 30% in X Kg alloy,
⇒ \(\frac{30}{100}\) x X = 300 gm,
⇒ X = 1000 gm
⇒ X = 1 Kg.