Question

7. The volume of a cylinder is 30 cm and area of base is 67 cm then find height of cylinder.
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Answer 1

Step-by-step explanation:

vol. of cyl = py r²h

we know that base of cyl is circle

so are of circle = py r²= 67

3.14× r²= 67

r²=67/3.1r²= 21.33 or r= √21.33= 4.61 cm

given vol = 30 cm³ so

3.14× 4.61×4.61×h = 30

3.14×21.33×h= 30

h= 30/3.14×21.33= 0.45 cm approx