Why does Stephen Hawking tell Firdaus Kanga that disabled olympics is a waste of time
 

Dear Rutuj,
We request you to go through the chapter summary available in your study material of grade 8, whose chapter link is given below:
https://www.meritnation.com/cbse/class8/summary/english/honeydew/a-visit-to-cambridge/31_404

Note:
Check the paragraph included under the heading 'Stephen Hawking as an inspiration'.

Regards,