a night campus was organised for class 9 th students for two days and their accomodation was planed in the - Maths - Surface Areas and Volumes

Question

a night campus was organised for class 9 th students for two days
and their accomodation was planed in the tent each tent in the
shape cylindrical surmounted by a hemispherical roof if the height
and diameter of the cylindrical are 1 4 and 5 meter respectively
find the area of the canvas used for making such a tent also find
the cost of canvas of the tent at the rate 350 per meter how these
type of camping are helpful for a child in her over all development

Avikal Singh · Answer

height of cylinder =1 4m
radius of cylinder =5/2m
radius of hemisphere =5/2m
area of canvas used in making
tent = 2πrh + 2πr²
=2πr(h+r)
=2×22/7×5/2[1 4+5/2]
=110/7×39/10
=429/7m²
cost for making tent=429/7×350
=₹21,450
Is this correct??