CSEC Mathematics · Question 6(b)(ii)

A diagram shows the cross-section of two cylindrical jars, Jar X and Jar Y. The diameters of Jar X and Jar Y are 3d cm and d cm respectively. Initially, Jar Y is empty and Jar X contains water to a height (depth) of 4 cm.

If all the water from Jar X is now poured into Jar Y, calculate the height it will reach.

This question uses a figure or table from the paper — you'll see it when you practise.