Question

please answer the 6th question ​

Answer 1

Step-by-step explanation:

volume of cuboid=4.4*2.6*1

=11.44m^3

v.of cuboid=v.of cylinder pipe

11.44=πr^2h

=π*40/100*40/100*h

h=11.44*25*7/22*4*100

h=22.7m

Answer 2

Length of the pipe would be 112 meter.

Step-by-step explanation:

First we convert all dimensions to cm.

1 meter = 100 cm

4.4 m = 4.4 × 100 = 440 cm

2.6 m = 2.6 × 100 = 260 cm

1 m = 1 × 100 = 100 cm

Here,

The volume of cuboid = volume of hollow cylinder

$400\times 260\times 100=\pi (R^2-r^2)h$

π = 22/7

r (internal radius) = 30 cm

w (thickness) = 5 cm

R (external radius) = 30 + 5 = 35

Let the length of the pipe be 'h'

$400\times 260\times 100=\frac{22}{7}(35^2-30^2)h$

$10400000=\frac{22}{7}(325)h$

11440000 = 1021.42h

h = 11,200 cm

11,200 cm = $\frac{11200}{100}$

                = 112 meter

Length of the pipe would be 112 meter.

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