Question

The area of the curved surface of a cone is 60cm . If the slant height of the cone be 8cm, find the
radius of the base​

Answer 1

Answer:

r=2.39 cm

Step-by-step explanation:

Given :

CSA = 60cm^2

slant height(l)=8cm

To find :

radius (r)

Formula:

CSA of cone = πrl

Solution:

60 = 22/7 ×r ×8

60×7/22×8 = r

420/22×8=r

420/176=r

r= 2.39 cm ( π= 22/7). .... (1)

60= 3.14 ×r×8

60=314/100×r×8

60×100/314×8=r

6000/2512 = r

r= 2.39 cm (π=3.14) ..... (2)

therefore answer is correct

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