Explanation:

Correct option:3

Solution:

Let Ram's monthly income = Rs. x.

He spends 30% on food, so remaining = 70% of x = 0.7x.

He spends 50% of remaining on household = 0.5 × 0.7x = 0.35x.

 Left after both = 0.7x – 0.35x = 0.35x.

 This leftover, 0.35x, equals his savings: 0.35x = 10,500

  x = 10,500 / 0.35 = 30,000.

 Ram’s income is 25% less than Shyam’s

75% of shyam's income=30000

Shyam's income=30000/75 x 100=40000

Hence option 3 is the correct answer.