Yes, we can say that volume of cylinder B is greater, since radius of cylinder B is
greater than that of cylinder A (and square of radius gives more value than
previous).
Diameter of cylinder A = 7 cm
⇒ Radius of cylinder A = 7/2cm
And Height of cylinder A = 14 cm
∴ Volume of cylinder A = πr²h = 22/7×7/2×7/2×14
= 539 cm³
Now Diameter of cylinder B = 14 cm
⇒ Radius of cylinder B = 14/2 = 7cm
And Height of cylinder B = 7 cm
∴ Volume of cylinder A = πr²h = 22/7x7x7x7
= 1078 cm³
Total surface area of cylinder A = πr(2h+r)
[∵ It is open from top]
22/7×7/2(2×14+7/2)=11x(28+7/2)
= 11×63/2=346.5 cm²
Total surface area of cylinder B = 𝜋r(2h+r) [∵It is open from top]
= 22/7×7(2×7+7)
22x (14+7) = 22×21 = 462cm²
Yes, cylinder with greater volume also has greater surface area.

Class 8 Maths Chapter 11 Exercise 11.4 Solution in Video

for more answers vist to:
https://www.tiwariacademy.com/ncert-solutions/class-8/maths/chapter-11/