A section of guttering can hold up to 20 litres of rainwater. The diameter is 11cm. Work out the length in metres.

2.1 m

Step-by-step explanation:

The gutter is in the shape of a cylinder.

Its volume is 20 liters and its diameter is 11 cm (0.11 m).

Its radius is half of its diameter => r = 0.055 m.

The volume in cubic metres:

1 litre = 0.001 cubic metres

20 litres = 20 * 0.001 = 0.02 cubic metres

The volume of a section of guttering is given as:

where h = length of the guttering

Therefore:

The length of the section of guttering is 2.1 m long.

-12 > a

step-by-step explanation:

-11 > 1 + a

subtract 1 from each side

-11-1 > 1-1+a

-12 > a

1) 2/5

2) zero=0/1

3) zero=0/2

4) -4/5

5) undefined=3/0