Question

If the ratio of capacities of 3 water tanks is 3: 5: 7 and the largest of them can hold 3500 litres of water, then what is the total volume of water that can be held by all the three tanks together?

• A. 500 litres
• B. 1500 litres
• C. 7500 litres
• D. 2500 litres

Answer 1

The correct option is C

7500 litres

Given: Ratio of capacities of water tanks = 3: 5: 7.

$\therefore$ Let the volume of tanks be 3$x$, 5$x$ and 7$x$.

Given that the largest tank can hold 3500 litres of water.

$\therefore$ 7$x$ = 3500

$\Rightarrow$ $x$ = $\frac{3500}{7}$

= 500

The total water that can be held by all the three tanks together = 3$x$+5$x$+7$x$

= 15$x$

= 15$\times$500

= 7500 litres