class teacher of a school taught the students to prepare cylindrical pen holders out of a cardboard in a class of strength 42 if each child prepare a pen holder of radius 5 cm and height 14 cm how much cardboard was consumed
Answers
Answered by
1
A pen holder will have shape of a hollow cylinder with open top, so, surface area of one such open holder will be :- 2πrl + πr^2
so, cardboard consumed in one pen holder = 2π( 5×14 + 5×5) = 2π ( 95) cm^3
strength of class is 42, so, total cardboard used is 40 × 190π cm^3
= 23864 cm^3
= 0.023 m^3
so, cardboard consumed in one pen holder = 2π( 5×14 + 5×5) = 2π ( 95) cm^3
strength of class is 42, so, total cardboard used is 40 × 190π cm^3
= 23864 cm^3
= 0.023 m^3
Ayluma1:
I think this answer is wrong
why?
give me any reason
and sry for texting this
it's 100% correct
wen I searched in Google there was different answer
sry once again
thanks for helping me
Answered by
1
r=5cm. h=14cm
area of one holder=CSA of cylinder+ar of base
=2πrh+πr sq.
=2π5×14+5π
=140π+5π
=145π
total cardboard consumed by 42students
=145π×42
=6090π
=19122.6cm
area of one holder=CSA of cylinder+ar of base
=2πrh+πr sq.
=2π5×14+5π
=140π+5π
=145π
total cardboard consumed by 42students
=145π×42
=6090π
=19122.6cm
sorry i didn't think about one open end
that's fine thank you for helping
thank you so much
yupp, those are small things that require a bit of thinking
can you try to help me Prisha123
ayluma , you know what, always try to develop thinking skill, my solution is 100% correct, unless you have given any incorrect data, tell me if i have used something, which is incorrect,..
Similar questions