In a business, A invests ₹50000 for 6 months; B ₹60000 for 4 months and C ₹80000 for 5 months. If they together earn ₹18800, find share of each.

A invests ₹50000 for 6 months, total investment of A = ₹50000 x 6 = ₹300000.

B invests ₹60000 for 4 months, total investment of B = ₹60000 x 4 = ₹240000.

C ₹80000 for 5 months, total investment of C = ₹80000 x 5 = ₹400000.

Ratio of share of A, B and C = 300000 : 240000 : 400000 = 30 : 24 : 40.

Sum of ratios = 94.

Given, total earning = ₹18800.

Share of A = $\dfrac{30}{94} \times 18800$ = $\dfrac{564000}{94}$ = ₹6000.

Share of B = $\dfrac{24}{94} \times 18800$ = $\dfrac{451200}{94}$ = ₹4800.

Share of C = $\dfrac{40}{94} \times 18800$ = $\dfrac{752000}{94}$ = ₹8000.

Hence, the shares of A, B and C are ₹6000, ₹4800 and ₹8000 respectively.