>For this type of problem, rather than taking x as a variable, take a number which is a multiple of the LCM of the denominators.
COMBINING TWO RATIOS USING LCM:
> Finding a portion from a ratio and total number.
> Organise the initial ratios.
> Carry out any arithmetic operations related to expansion or reduction.
> Produce a combined ratio of the three components.
> Answer the question based on the final ratios in the table.
> A step-by-step methodical approach to such questions will lead you to the right answer more quickly.
Video on “Concept and Practice Problems of Ratio & Proportion”
Some Conversions:
1 yard= 3 feet
1 feet= 12 inches
1 mile= 1760 yard = 5280 feet
1 kg= 2.2 lbs(pounds)