Question

4. The ratio of radii two cylinders with equal height is 2:3. Then, the ratio of their curved surface
area is
(a). 4:9
(b) 2:3
(c). 8:27
(d) 3:2​

Answer 1

Answer:

Option B) 2 : 3

Step-by-step explanation:

$let \: the \: radius \: of \: both \: cylinders \: be \: 2x \: and \: 3x \\ = )ratio \: of \: curved \: surface \: area = ) \\ = ) \frac{curved \: surface \: area \: of \: first \: cylinder}{curved \: surface \: area \: of \: second \: cylinder} \\ = ) \frac{2\pi rh}{2\pi rh } \\ = ) \frac{2 \times \pi \times 2x \times h }{2 \times \pi \times 3x \times h} (since \: height \: is \: equal) \\ = ) \frac{2}{3} \\ = )2 : 3$

Hope it helped

Answer 2

Answer:

Answer is

Step-by-step explanation:

Option B is correct

2:3