'We don't make slow cars!' Billionaire Elon Musk unveils Tesla's 'affordable' $35,000 Model 3 that goes 0 to 60mph in under six seconds

The car is 20% smaller and half the price of the Model S and can fit five adults 'comfortably'. 

It was unveiled at an event in LA. The slick design features a continuous pane of glass in the rear roof for 'openness'. 

Musk said more than 115,000 Model S cars were ordered in the first 24 hours and that deliveries are slated to begin next year.