Development of a solar-powered car has been an engineering goal since the 1980s. The World Solar Challenge is a biannual solar-powered car race, where teams from universities and enterprises compete over 3,021 kilometres (1,877 mi) across central Australia from Darwin to Adelaide. In 1987, when it was founded, the winner's average speed was 67 kilometres per hour (42 mph) and by 2007 the winner's average speed had improved to 90.87 kilometres per hour (56.46 mph). The North American Solar Challenge and the planned South African Solar Challenge are comparable competitions that reflect an international interest in the engineering and development of solar powered vehicles. COUNT 7
QSN1 What is the name of the solar powered car race held every two years? ANS1 The World Solar Challenge QSN2 What was the winner of the World Solar Challenge's average speed in 2007 in km/h? ANS2 90.87 QSN3 What is The World Solar Challenge? ANS3 a biannual solar-powered car race QSN4 When was The World Solar Challenge started? ANS4 1987 QSN5 What was the average speed of a winning solar powered car in 1987? ANS5 67 kilometres per hour (42 mph) QSN6 What was the average speed of a winning solar powered car by 2007? ANS6 90.87 kilometres per hour (56.46 mph) QSN7 What are some other similar car races that use solar powered vehicles? ANS7 The North American Solar Challenge and the planned South African Solar Challenge