किसी वस्तु को ₹86 में बेचने पर प्राप्त लाभ, उसी वस्तु को ₹53 में बेचने पर होने वाली हानि का दोगुना है। वस्तु का क्रय मूल्य ज्ञात कीजिए।

A company considers hiring an extra machine for $150 per day to produce additional units. If the additional throughput contribution generated from producing these units on the machine is $390, by how much will total profit increase?

If the cost price of an article is 85 times its selling price, what is the loss percentage?