Rainfall counting meter

Aim :- to make Rainfall measuring instrument.

Requirement :- 1litre bottle , funnel 100 mm.

Procedure :- take a bottle and place it on the area which is been decided

Place a funnel at the top of the bottle .as it starts to rain the water in the funnel get collected  in the bottle . In collected water in bottle is took measuring cylinder. Took the

Surface area of the funnel . If the 100ml water collected in funnel.

Ex-10 cm of funnel will give you the surface area .

Formula = funnel surface area =10

             1=3.14 =10

             3.14 × 5 mm × 6 mm = 3.14 × 25 mm sq.

             15.500 mm

             1.42 m sq .

              =100

                1litre.