The American computer giant Apple has announced a strong sales of its iPhone and Macintosh computers helped profits to leap by 90 per cent in the first quarter of 2010. It made a net profit of 3.1 billion dollars while revenue rose 49 per cent to 13.5 billion dollars in the three months to 27 March. Apple said it sold about nine million of its popular smart phone – more than double the figure from a year earlier. The profits were well ahead of market expectations, and sent its shares about 6 per cent higher.