A reduction of 20% in the price of tea enables a man to obtain 4 kg more for Rs.80. What is the reduced price per kilo?

Mr. Sanjay Sharma, Mr. Pravesh Khare and Mr. Mitra are partners in a business. Mr Mitra started the business with Rs. 40,000. After 3 months, Mr Sanjay and Mr. Pravesh joined him with Rs. 60,000 each. If the total profits at the end of the year amount to Rs. 31,200, what would be Mr Khare's share in it?

Prasoon's bike needs a fresh paint. He wants 2 shades on his bike. The painter shows all the available 5 shades. In how many ways can Prasoon paint his bike?