Answers

2015-01-31T19:25:18+05:30
[1 min=60 sec]
sela takes 60 sec for 10 apples
then, sela will take (60/10*7)=42 sec
therefore, sela will take 42 sec to eat 7 apples.
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2015-01-31T19:27:14+05:30
Secs in one min= 60
10 apples in 60 secs
so,
1 apple = 60/10
7 apples = 60/10 * 7
= 42 secs.....
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