TBQ - Find the time taken — task. Maths CBSE Live product, Class 7 (2025-26).

A water tank is filled from a tap.

If the tap is open for \(1\) hour, \(\frac{7}{10}\) of the tank gets filled.

How much of the tank is filled if the tap is open for

(a) \(\frac{1}{3}\) hour \(=\)

\frac{i}{i}

of the tank is filled

(b) \(\frac{4}{5}\) hour \(=\)

\frac{i}{i}

of the tank is filled

(c) \(\frac{3}{4}\) hour \(=\)

\frac{i}{i}

of the tank is filled

(d) \(\frac{9}{10}\) hour \(=\)

\frac{i}{i}

of the tank is filled

(e) For the tank to be full , how long should the tap be running?

\(=\)

i \frac{i}{i}

\(\text{hours}\)

[NOTE: With simplication]

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5. TBQ - Find the time taken