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Step-by-step explanation:
3. circumference of base = 88cm
2πr = 88
2 x 22/7 x r = 88
44/7 x r = 88
R = 88 x 7/44
R= 14 cm
Height of cylinder = 15 cm
T.S.A. of cylinder = πr(r+h)
= 22/7 x 14 (14 + 15)
= 44(29)
= 1276 cm2
4. L.S.A of cube = 4a2= 4(10)2= 4 x 100 = 400 cm2
The volume of cuboid = 2(l + b) x h = 2(12.5+10) x 8 = 22.5 x 16 = 360 cm2
Cube has more L.S.A. BY 400-360=40 cm2
5. It generate a cylinder. Where r=7 and h= 25cm.
T.S.A of cylinder = πr(r+h)
= 22/7 x 7(7+25)
=22 x 32
= 704 cm2
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