Question

How are the units 

(i) square yard 

(ii) hectare 

(iii) km² 

(iv) cm² 

(v) mm² related to the S.I. unit of area ?

Answer 1

(i) Square yard: One square yard is the area of square of each side 0.836 metre.

(ii) Heatare : one hectare is the area of a square of each side 100 metre. thus,

1 hectare = 100 metre x 100 metre = 10000 metre² (or 10⁴ m²)

(iii) Km² : one square kilometre is the are of a square of each side 1 kilometre. Thus,