Question

Plzz solve sixth question

Answer 1

R = radius of ballon =5 cm

r = radius of pumped ballon = 10cm

surface area of sphere before inflated / urface area of spherical ballon after inflated

=4×(22/7)×R×R / 4 × (22/7) × r×r

= R×R/r×r

=5×5/10×10

= 25 / 100

= 1:4