27. a farmer divides his herd of cows among his
four sons so that first son gets one half of the
berd, the second son one-fourth, the third son
one fifth and the fourth son 7 cows, the total
number of cows in the herd is:

we have to find a common denominator for the fractions so

1/2 1/4 1/5

they all go into 20

so

10/20 5/20 4/20

in total that is 19/20

so the last son has 1/20 which is seven

so 20/20 is 20 times that amount which is 140

140 cows

Step-by-step explanation:

30 feet

step-by-step explanation:

that would be 2 1/2 * 12

= 24 + 6

= 30 feet   (answer)

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