16. DEFG is a square. Find the value
of x.

calculate the volume of a prism whose length is 25cm and cross-section is an equilateral triangle of sides 3

a square adds up to 360°degrees so 1 angle adds to 90degrees so 18x° =90°

so x=5

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.