Question

A sailor is allowd 7 days off for 30 days at sea. For 28 days off how many days at sea must a sailor spend

Answer 1

Answer:

120

Step-by-step explanation:

7:30 :: 28:?

as we know,

Product of means  = product of extremes

7*x = 30*28

x = 30*28/7

x = 30*4

x = 120

You can do it without taking 'x' as well.

This is how i process it (need to be thorough with tables)

7 times something is 28 then 30 times the same thing will be?

7 times 4 is 28 so, 30*4 =120; our answer