Answer:
i think i dont know but where it says 750kg (55m/......) divided by 2 and then when he has got that i think he has divided it again by the measurements
sorry if thats not right but its worth trying if you dont get it then re watch it and make notes at the same time and then work out where he might of got it from that way.
also i did put .... only because i could see that part as it was abit bleared
Step-by-step explanation:
