Question

The lateral surface area of a right circular cylinder of radius 3cm is 94.2cm2.The height of the cylinder is
a)5cm
b)4.5cm
c)5.5cm
d)none of these

Answer 1

Answer:

Hence, the radius of the base is 3 cm. = 3.14 x (3)2 x 5 = 141.3 cm3.

Step-by-step explanation:

Answer 2

Given :-

Lateral surface area of cylinder = 94.2 cm²

Radius = 3 cm

To Find :-

Height of the cylinder = ?

Formula used here :-

Lateral surface area cylinder = 2πrh

Solution Start :-

Lateral surface area of cylinder = 2πrh

94.2 cm² = 2 × 22/7 × 3 × h

$\frac{94.2 \times 7}{2 \times 22 \times 3} = h \\ \\ \frac{659.4}{132} = h \\ \\ approx \: 4.9 \: m \: = h$

Height = approx 4.9 m

So, you can take 5cm .