(10. Ria and John started walking at constant speeds from the same spot in opposite directions along the beach. After they had walked for 30 minutes, they were 4km apart.
Rita's speed was 3.5km/h. What was John's speed?​

i got 10.28 but that rounds up to 10.3

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.