1.it's 5464 kilometers in lenth.
2.It's 6397 kilometers in lenth.
3.I's 151 years old.
4.It's 229 meters in width.
5.I'm 65 kilograms.
6.He's 1.70 meters.
7.It's 256 years old.
8.It's 20 yuan.
9.There are 5 people in my family.
10.It's 1528 kilometers.
PS:5,6,9不能用it,5和9主语是人,6是there be句型,只能用there be 回答.