Question

What is the slant height if the surface area is 395.64 square meters?

(drawing)

Answer 1

is it total surface area of curved surface area???

Answer 2

It doesn't say. All it says is (use 3.14 for n)

Answer 3

If it is Curved Surface area then it is = πrl where l is the slant height
Let the slant height be = l m
ATQ,
395.64 sqm = 3.14 * 7 m * l m

395.64
------- = l
3.14 * 7

hence l = 18

so the slant height is 18 m

Answer 4

o: wait i think they mean the total surface area

Answer 5

then total surface area = πrl + πr^2 = πr(l + r)

395.64 = 3.14*7 (l + 7)

395.64
------- = l + 7
3.14*7

18 = l + 7
18 - 7 = l
11 = l

so the slant height is 11 m

is it ok now????

Answer 6

Yess :D ! Ty

Answer 7

u r welcome...☺