Aman launches his boat from point a on a bank of a straight river, 4 km wide, and wants to reach point b, 4 km downstream on the opposite bank, as quickly as possible (see the figure below). he could row his boat directly across the river to point c and then run to b, or he could row directly to b, or he could row to some point d between c and b and then run to b. if he can row 6 km/h and run 8 km/h, where should he land to reach b as soon as possible? (we assume that the speed of the water is negligible compared to the speed at which the man rows.)

answer: the answer is one of

step-by-step explanation:   we are given to write a proper fraction where the whole is divided into an even number of equal parts less than ten, and an odd number of those parts exist.

an even number less than 10 may be one of 2, 4, 6 or 8. so, the whole may be one of these four evens.

now, an odd number of these parts must exist, so the numerator must be an odd number, one of 1, 3, 5 or 7. it cannot be 9 because then the fraction will become improper.

thus, our fraction may be one of the following

there is no grid

step-by-step explanation: