Question

the lateral surface area of cylinder is 94.2cm.and it's hight is 5cm find the radius​

Answer 1

lsa=94.2

h=5

lsa=2πrh

94.2=2*22/7*r*5

94.2*7/220=r

r=2.99

Answer 2

lateral surface area of cylinder = 2πrh

94.2cm = 2πrh

94.2cm = 2 x 3.14 x r x 5cm

94.2 cm = 10 x 3.14 cm x r

94.2 cm= 31.4 cm x r

94.2 / 31.4 cm = r

3cm = r

So , radius = 3cm