SOLUTION
Sales during that period of the firm from 1st April, 2017 to 30th June, 2017 Rs. 6,00,000
The rate of profit during the past four years had been 10% on sales
Profit of the firm from 1st April, 2017 to 30th June, 2017 is Rs. 6,00,000 × 10/100 = Rs. 60,000
Share of Profit is Rs. 60,000 × 2/6 = Rs. 20,000