In an examination, one of the questions requires Shweta to calculate the distance between the sun and Jupiter. It is given that the time taken by light to cover this distance is about 43 minutes. To reduce calculation, the speed of light is to be taken as 10 units. However, the value used by Shweta is such that her answer comes out to be 40% less than the desired answer. \[\] What is the value of the speed of light used by Shweta in her calculations?