Arun and Ajoy started a business jointly by investing ₹24000 and ₹30000 respectively at the beginning of the year. But after a few months Arun invested ₹12000 more. After a year, the profit was ₹14030 and Arun received the profit share of ₹7130. Let us find after how many months did does Arun invest money in that business.

Niyamat chacha and Karabi didi have started a partnership business together by investing ₹30000 and ₹50000 respectively. After 6 months Niyamat chacha has invested ₹40000 more but Karabi didi has withdrawn ₹10000 for personal need. If the profit at the end of the year is ₹19000, let us write by calculating the profit share of each of them.

Srikant and Soiffuddin invested ₹240000 and ₹30,0000 respectively at the beginning of the year to purchase a mini bus to run it on a route. After 4 months, their friend Peter joined them with a capital of ₹81000. Shrikant and Soiffuddin have withdrawn that money in the ratio of their capitals. Let us write by calculating the share of each if they make a profit of ₹39150 at the end of the year.

Three clay modellers from Kumartuli collectively took a loan of ₹100000 from a cooperative bank to set up a modelling workshop. They made a contract that after paying back the annual bank instalment of ₹28100, they would divide half of the profit among themselves in terms of the number of working days and the other half will be equally divided among them. Last year they worked 300 days, 275 days and 350 days respectively and made a profit of ₹139100. Let us write by calculating the share of each in this profit.

Two friends invested ₹40000 and ₹50000 respectively to start a business. They made a contract that they would divide 50% of the profit equally among themselves and the remaining profit in the ratio of their capitals. Let us write the share of profit of the first friend if it is ₹800 less than that of the 2^nd friend.