Question

1 yard (yd) = 3 feet (ft); 1 foot (ft) = 12 inches (in) how many inches are there in 5 yards?

Answer 1

Answer: 180 inches

Explanation:

We can use dimensional analysis. Our desired units are inches per yard. Begin by writing down:

`(12in)/(1ft)`

Then use the conversion factor of feet to yard. The units of feet will cancel giving:

`(12in)/(1ft) *(3ft)/(1yd)=(36in)/(1yd)`

Multiply the top and bottom by 5 to get:

`(36in)/(1yd) *(5)/(5) =(180in)/(5yd)`