Question

A $10feet$ long metal bar weighs $128pounds$. What would be the weight of a similar bar that is two $feet$ six $inches$ long?

Answer 1

Step 1: Convert $foottoinches$

$10feet$= $10\times 12=120inches$ $\left(1feet=12inches\right)$

$2feet6inches=2\times 12+6=24+6=30inches$ $\left(1feet=12inches\right)$

Step 2: Find the weight

$120inches$ long metal bar weighs $128pounds$

$1inches$ long metal bar weighs $\frac{128}{120}pounds$

$30inches$ long metal bar weighs $\frac{128\times 30}{120}pounds=32pounds$

Hence, the weight of two $feet$ six $inches$ long bar $=$ $32pounds$.