Ratio men to women on bus is 2: 3 4 women got off and ratio is 4: 5 how many men are on bus

Solution: Let us suppose there are m men and w women on bus.

Therefore, we have:

Also we know that after 4 women got off, the ratio of men to women becomes 4:5

We can write:

       (cross multiplication)

Therefore, there are 16 men on bus

7 weeks

step-by-step explanation:

convert each fraction to the least common multiple of 20, so 3/4 = 15/20 & 1/10 = 2/20, then divide 15 by 2 and you get a little over 7, so the food will last 7 weeks.