Hey Ashwin! Usually it would cost you $10-$30 (USD) for a meal for 2. If you need more info on covering Maldives on budget, click on the link that I've shared below. It should help you plan better. https://www.tripoto.com/trip/maldives-on-a-budget-636376
It totally depends on where you are staying, on public islands it's cheaper whereas on private islands its very pricey. You can check out my posts for details on Maldives.