1.  If the imports in 1998 was ₹ 250 crores and the total exports in the years 1998 and 1999 together was ₹ 500 crores, then the imports in 1999 was ?
A. ₹ 250 crores
B. ₹ 300 crores
C. ₹ 357 crores
D. ₹ 420 crores
E. None of these

Answer: Option D

Explanation:

The ratio of imports to exports for the years 1998 and 1999 are 1.25 and 1.40 respectively.

Let the exports in the year 1998 = ₹ x crores.

Then, the exports in the year 1999 = ₹ (500 - x) crores.

Therefore 1.25 = 250     =>  x = 250 = 200      
x 1.25

[Using ratio for 1998]

Thus, the exports in the year 1999 = ₹ (500 - 200) crores = ₹ 300 crores.

Let the imports in the year 1999 = ₹ y crores.

Then, 1.40 = y   => y = (300 x 1.40) = 420.
300

Therefore Imports in the year 1999 = ₹ 420 crores.