The Supertech twin towers in Noida are set to be demolished at 2:30 pm today. The two massive towers - nearly 100 metres tall - will be razed down using 3,700 kg of explosives. The collapse will last for nine seconds, the project's engineer has said, and another 12 minutes for the dust to settle. The Supreme Court had last year ordered the demolition of the towers for the violation of building norms.