The student of a school decided to makr and sell 2000 cylindrical penholders of radious 3.5 cm and hight 10 cm and donated the collected amount to prime minister's. Relif fund for helping people of uttrakhand the school supported tye action of the student by supplying tge cardboard for making oen holders.
(a) how much cardboard was required ?
(b) what value is depicted in this work ?
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Hi there !!
a )
Radius , r = 3.5 cm
Height , h = 10cm
Cardboard required for making i pen holder = C.S.A of cylinder + 1 base area
C.S.A = πr²h
= 22/7 × 3.5 × 3.5 × 10
= 385 cm²
Base area = πr²
= 22/7 × 3.5 × 3.5
= 38.5 cm²
Cardboard required for 1 pen holder = 385 + 38.5
= 423.5 cm²
Cardboard required for 2000 pen holders = 423.5 × 2000
= 847000 cm²
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b) The children are very keen to help others.They are sensitive enough to understand the needs of others
a )
Radius , r = 3.5 cm
Height , h = 10cm
Cardboard required for making i pen holder = C.S.A of cylinder + 1 base area
C.S.A = πr²h
= 22/7 × 3.5 × 3.5 × 10
= 385 cm²
Base area = πr²
= 22/7 × 3.5 × 3.5
= 38.5 cm²
Cardboard required for 1 pen holder = 385 + 38.5
= 423.5 cm²
Cardboard required for 2000 pen holders = 423.5 × 2000
= 847000 cm²
==========================================================
b) The children are very keen to help others.They are sensitive enough to understand the needs of others
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