Question

Find the radius of a base of a cone whose curved surface area is 1884.4m2 and slant height is 12cm

Answer 1

$\bf \large \it \: Hey \: User!!!$

given the slant height of the cone is 12cm =

CSA of the cone = 1884.4m² = 18844000cm²

we know the formula for the CSA of the cone, that is πrl where r is the radius of the base of the cone and l is the slant height of the cone.

therefore πrl = 18844000cm²
>> 22/7 × r × 12 = 18844000m²
>> 12 × r = 18844000/1 × 7/22
>> 12 × r = 5995818.18
>> r = 5995818.18/12
>> r = 499651.515 cm

hence, the radius of the cylinder is 499651.515 cm.

$\bf \large \it{Cheers!!!}$

Answer 2

hi dude!!

your answer...

given

•        curved surface area of cone is 1884.4 m² = 188440 cm²

•        slant height is 12cm

C.S.A = πrl

188440 = 3.14×r×12

by moving r towards LHS and others towards RHS.

r = 188440/3.14×12

r = 188440/37.68

r = 5001.0615 cm²

r = 5001 cm² approx.

hope it helps you.....