Question

What’s the perimeter?

Answer 1

There is 100cm in 1m
So 2m 10cm is 210cm

2(210)+2(45)=420+90=510

510cm or 5m 10cm

Answer 2

5 m and 10 cm

45 plus 45 is 90

2 m plus 2 m is 4 m

10+10 cm is 20 cm