The square cms of tin required to make a cylindrical bucket 28 cm high and 14 cm in diameter is :::::::::::::::::. (a) 1200 sq cm (b) 1386 sq cm (c) 1640 sq cm (d) 1420 sq cm
ho sake to solve b krdo
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Given : a cylindrical bucket 28 cm high and 14 cm in diameter
To Find : The square cms of tin required to make bucket
(a) 1200 sq cm (b) 1386 sq cm (c) 1640 sq cm (d) 1420 sq cm
Solution:
Surface are of cylindrical bucket
= 2πrh + πr²
(as bucket is open from top)
r = diameter/2 = 14/2 = 7
h = 28 cm
2πrh + πr² = 2 (22/7)7*28 + (22/7)*7²
= 1232 + 154
= 1386 cm²
The square cms of tin required to make bucket = 1386 cm²
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