Question

plz plz plz answer me fast, The correct one I will mark brainliest​

Answer 1

Step-by-step explanation:

given

radius (r) =7cm

height (h) = 25cm

(1) curved surface area ( neither base nor top)

= 2π r h

= 2× 22/7 ×7×25

= 1100 cm²(ans)

2. surface area when it has base no top

= curved surface area + base area

= 2πrh+ πr²

= 1100 + 22/7 × 7²

= 1100+ 154

= 1254cm²

3.total surface area

= curved surface area + base area + top area

= 1100+ 2× base area ( same top and base area for cylinder)

= 1100+ 2× πr²

= 1100+ 2×22/7× 7²

= 1100+ 308

= 1408 cm²

Answer 2

Step-by-step explanation:

1.the the curved surface area of a cylinder is 2πrh

this given their height is 25 CM

then the answer will be 2×3.14×7×25

=1099

2. 1252.86

3. 1406.72

please check the answers and mark me as brainliest