Radius (r1) of spherical balloon = 7 cm
Radius (r2) of spherical balloon, when air is pumped into it = 14 cm
\(\text{Required ratio}=\frac{\text{Initial surface area}}{\text{Surface area after pumping air into the balloon}}\)
\(=\frac{4\pi r^2_1}{4\pi r^2_2}\)
\(=(\frac{r_1}{r_2})^2\)
\(=(\frac{7}{14})^2=\frac{1}{4}\)
Therefore, the ratio between the surface areas in these two cases is 1:4.
Use these adverbs to fill in the blanks in the sentences below.
awfully sorrowfully completely loftily carefully differently quickly nonchalantly
(i) The report must be read ________ so that performance can be improved.
(ii) At the interview, Sameer answered our questions _________, shrugging his shoulders.
(iii) We all behave _________ when we are tired or hungry.
(iv) The teacher shook her head ________ when Ravi lied to her.
(v) I ________ forgot about it.
(vi) When I complimented Revathi on her success, she just smiled ________ and turned away.
(vii) The President of the Company is ________ busy and will not be able to meet you.
(viii) I finished my work ________ so that I could go out to play