Question

40. An ore contains 20% of an alloy that has 50% cop-
per. Other than this, in the remaining 80% of the orc,
there is no copper. How many kilograms of the ore
are needed to obtain 10 kg of purc copper?
(a) 100 kg
(b) 125 kg
(c) 80 kg
(d) 75 kg​

Answer 1

Answer:

100kg is the correct naswer