Sadaf

ABCD is a trapezium in which AB is parallel to DC and its diagonals intersect each other at point O .Show that AO/BO=CO/DO

It takes for three gardeners 90 minutes to weed a garden. If the job is to be done in only 15 minutes, how many more gardeners need to be put on the jobs?

Given the following balanced equation, determine the mass of iron metal that would be produced from the complete reaction of 94.7g of aluminum with excess iron II oxide. 2 Al(s) + 3FeO(aq) → 3Fe(s) + Al2O(aq)