Question

solve ques 19plzzzzzz​

Answer 1

Here diameter d = 7 cm than,

r = 3.5cm

total volume of solid = volume of cylinder

$= \pi {r}^{2} h \\ = \frac{22}{7 } \times {(3.5)}^{2} \times 20cm \\ = \frac{22}{7} \times \frac{35}{10} \times \frac{35}{10} \times 20 \\ = 22 \times \frac{5}{10} \times \frac{7}{2} \times 20 \\ = 22 \times \frac{1}{2} \times \frac{7}{2} \times 20 \\ = 5390 {cm}^{3}$

Answer 2

Here diameter d = 7 cm than,

r = 3.5cm

total volume of solid = volume of cylinder

\begin{lgathered}= \pi {r}^{2} h \\ = \frac{22}{7 } \times {(3.5)}^{2} \times 20cm \\ = \frac{22}{7} \times \frac{35}{10} \times \frac{35}{10} \times 20 \\ = 22 \times \frac{5}{10} \times \frac{7}{2} \times 20 \\ = 22 \times \frac{1}{2} \times \frac{7}{2} \times 20 \\ = 5390 {cm}^{3}\end{lgathered}

=πr

2

h

=

7

22

×(3.5)

2

×20cm

=

7

22

×

10

35

×

10

35

×20

=22×

10

5

×

2

7

×20

=22×

2

1

×

2

7

×20

=5390cm

3