The speed of the car was 45 mph. a driver noticed that while moving with this speed it took him 40 seconds to cross a bridge. on the way back crossing the same bridge, it took him 30 seconds. what was the speed of the car on the way back?

answer: the anser is 3

step-by-step explanation:

c- 2o is equal to 9

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.