Question

external radius and internal radius of a hollow cylinder are 8 cm and 7 cm respectively if height of a cylinder is 30 cm then find internal volume and total surface area of cylinder ​

Answer 1

Answer:

radius ra of Interior of internal cylinder is equal to 7 cm and its height is equal to 30 cm volume of a cylinder is equal to pie rki square×h=22÷7×7×30=22×30=660ans total surface are (2pie r h)=2×22÷7×7×30=44×30=1320

Step-by-step explanation:

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Answer 2

Answer:

external radius =8 cm

internal radius = 7 cm

hight = 30

internal volume= πrsquare h

22/7×7×30

22×30= 660

total surface area= 2πr(r+h)

2×22/7×8×7(8×7+30)

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