Find the time taken fill the lorry with sand — task. Maths CBSE Live product, Class 7 (2025-26).

A lorry is filled with sand from a Backhoe loader.

If the Backhoe loader is worked for \(1\) hour, \(\frac{7}{10}\) of the lorry gets filled.

How much of the lorry is filled if the Backhoe loader worked for

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

\frac{i}{i}

of the lorry is filled

(b) \(\frac{6}{7}\) hour \(=\)

\frac{i}{i}

of the lorry is filled

(c) \(\frac{8}{7}\) hour \(=\)

\frac{i}{i}

of the lorry is filled

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

\frac{i}{i}

of the lorry is filled

(e) For the lorry to be full , how long should the Backhoe loader be working?

\(=\)

i \frac{i}{i}

\(\text{hours}\)

[NOTE: With simplication]

Did you find an error?

6. Find the time taken fill the lorry with sand