Question

The length and the breath of a rectangular field are in ratio 7:4 .The cost of fencing the field at 25per meter is 3300.find the dimensions of the field.

Answer 1

let length be 7x cm
and breadth be 4xcm
A.T.Q.
2(7x+4x)×25=3300
22x×25=3300
x=6
therefore, length is 7×6=42cm
breadth is 4×6=24cm

Answer 2

hello friend

the area of rectangular Field = total fencing/fencing of per meter

area= 3300/25
area= 132cm ^2
let be the ratio be x
then length =7x
breadth= 4x
area of rectangular Field = l×b
132= 2(7x+4x)
132= 22x
132/22=x
6 =x
x= 6cm
then length 7x= 7×6=42cm
and breadth 4x= 4×6=24cm


thanks dear