If the price of four products is in ratio of 3 : 5 : 7 : 8, what is the ratio of the ratio of the revenue generated by these products in 2002?

Answer: Option D

Assume the total production of the first year as 10000, second year becomes 12000, third year 14400 and fourth year 17280.
Then,
0.2 × 17280 - 0.2 × 12000 = 1056
But this difference is given as 2640. Hence, the value of production will be; 25000, 30000, 36000, and 43200 respectively for the 4 years.
Ratio of revenue generated in 2002,
= 2 × 3 : 4 × 5 : 2 × 7 : 2 × 8
= 6 : 20 : 14 : 16
= 3 : 10 : 7 : 8