Question

The table below represents the weight of raw materials required(y) for various lengths of the bridge(x).

Weight of raw materials (pounds)	30	110	225
Length of bridge (yards)	6	22	45

Calculate the weight of raw materials required for 250 yard long bridge.

• A. 1000 pounds
• B. 1250 pounds
• C. 1500 pounds
• D. 750 pounds

Answer 1

The correct option is B 1250 pounds

From the data, $\frac{y}{x}$ is given as:

y	x	$\frac{y}{x}$
30	6	30/6 = 5
110	22	110/22 = 5
225	45	225/45 = 5

Hence,
$\frac{y}{x}=5$
$\Rightarrow y=5x$

∴ Weight required for 250 yard long bridge
$\Rightarrow \frac{y}{x}\times 250$
$\Rightarrow 5\times 250$
$\Rightarrow 1250$ pounds