Question

a test tube has diameter 20mm and height is 15 cm . the lower part is hemisphere. find the capacity of the test tube ?​

Answer 1

Answer:

$d = 20 \: mm = 2 \: cm \\ r = \frac{2}{2} = 1 \: cm \\ h = 15 \: cm \\ \\ so \\ v = \pi {r}^{2} h = \pi \times {1}^{2} \times 15 = 15\pi$