Please help and show steps. I'll thumbs up

Suppose 100 data items are stored on different locations of a hard disk (i.e., not contiguous). Each data item is exactly 50KB in size. The disk rotates at 10,000rpm and it takes 3ms to complete one revolution. Suppose the seek time of each data item takes 1ms and data transfer rate from hard disk to memory is 100KB/mss What is the average time needed to read all 100 data items from the disk to the memory