Question

A parallelogram has sides of 20 cm and 30 cm. If the distance between its shorter sides is 15 cm; find the distance between the longer sides.

Answer 1

Area of a parallelogram $=base\times height$.
The area of the parallelogram remains the same, if we consider any of the base and its corresponding height to calculate it.
Hence, Area of the parallelogram, $=20\times 15=30\times height$
$=>height=10cm$
Hence, the distance between the longer parallel sides of length $30cm$ is $10cm$