# The volume of open cylindrical can is 6358 cm3 and its height is 28 cm. find its radius and curved surface area

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h = 28

22/7 * r *r * 28 = 6358

88*r*r = 6358

r*r = 6358/88

r*r = 72.25

r = square root of 72.25

r = 8.5

Ans: 8.5 cm

and curved surface area= 2πrh

=2×π×8.5×28

=1495.39 cm^2

volume of cylinder =π r² h = 6358

22/7 × r² × 28 = 6358

88 r² = 6358

r² = 6358 / 88

r² = 72.25

r =√72.25

r = 8.5 cm

curved surface area of cylinder = 2πrh

= 2 × 22/7 × 8.5 × 28

= 1496 cm²