Question

The length and width of a rectangular field is in ratio 3:4. Its area is 6912 sq.cm. What its dimensions?

Answer 1

 Let 

Length, L = 3k

Width ,W = 4k

Area = 3k * 4k

6912 = 12k^2

k^2 = 576

k = 24

Therefore dimensions are :

L = 3k = 72
W = 4k = 96