Question

Ten lamps can burn 10 liters of oil in 10 hours. How many lamps can burn 20 liters of oil in 20 hours?

Answer 1

Answer:

I think the answer is 10

Step-by-step explanation:

Answer 2

Answer:

10 lamps can burn 20 liters in 20 hours.

Step-by-step explanation:

Given:- 10 lamps can burn 10 liters of oil in 10 hours.

To Find:- Number of lamps that can burn 20 liters of oil in 20 hours.

Solution:-

Let 'x' represent the rate of burning per lamp in liters per hour.

⇒ 10x = $\frac{10}{10}$

⇒ 10x = 1

⇒ x = $\frac{1}{10}$ liter per hour

Let 'n' represent the number of lamps that burn 20 liters in 20 hours.

Then,

⇒ x * n = $\frac{20}{20}$

⇒ $\frac{n}{10}$ = 1

⇒ n = 10 lamps

∴ 10 lamps can burn 20 liters in 20 hours.

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