Question

the length of rectangular reservoir is450m. if the perimeter is 1200m.find it's area in ares​

Answer 1

Answer:

Length of tank =180m

Breadth of tank =120m

Area of tank

=l×b

=180×120

=21600m

2

Area of land portion =40000m

2

Therefore,

Area of circular field =40000+21600=61600m

2

Let r be the radius of a circular field.

Therefore,

Area of field =πr

2

⇒πr

2

=61600

⇒r

2

=

22

61600×7

⇒r=

19600

=140m

Hence the radius of field is 140m.