Question

Length and width of a field are in the ratio 5 : 3. If the width of the field is 42 m, then its length is

(a) 50 m
(b) 70 m
(c) 80 m
(d) 100 m

Answer 1

(b) 70 m
Ratio of length and width of the field = 5 : 3

Let the length be x m.

$\because$ Width = 42 m

​$\therefore$ Length = $\frac{5}{3}=\frac{x}{42}\Rightarrow x=\frac{5}{3}\times 42=70\mathrm{m}$