Question

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Answer 1

Answer : 14.8 m

Given that : Length = 7m

Breadth = 6m and

Height = 15m

As we know that :

Volume of Cuboid :

$l \times b \times h \: \\ \\ = > 7 \times 6 \times 15 \\ \\ = > 630 \: {m}^{3}$

As we know that : 1 m³ = 1000 litre

So, 630 m³ = 6,30,000 litre

Also given that : 8400 litre pumped out.

Now, 630000–8400 = 621600 litre

It means
$621600 \: litre = \frac{621600}{1000} = 621.6 \: {m}^{3}$

Now, Fall in the water level in water tank :

$7 \times 6 \times h = 621.6 \\ \\ = > h = \frac{621.6}{7 \times 6} \\ \\ = > 14.8 \: m$

So, level of water after pumping is 14.8 m

Answer 2

Answer : 14.8 m

Given that : Length = 7m

Breadth = 6m and

Height = 15m

As we know that :

Volume of Cuboid :

$\begin{lgathered}l \times b \times h \: \\ \\ = > 7 \times 6 \times 15 \\ \\ = > 630 \: {m}^{3}\end{lgathered}$

l×b×h

=>7×6×15

=>630m

3

As we know that : 1 m³ = 1000 litre

So, 630 m³ = 6,30,000 litre

Also given that : 8400 litre pumped out.

Now, 630000–8400 = 621600 litre

It means

$621600 \: litre = \frac{621600}{1000} = 621.6 \: {m}^{3}$

=621.6m

Now, Fall in the water level in water tank :

$\begin{lgathered}7 \times 6 \times h = 621.6 \\ \\ = > h = \frac{621.6}{7 \times 6} \\ \\ = > 14.8 \: m\end{lgathered}$

7×6×h=621.6

=>14.8m

So, level of water after pumping is 14.8 m