The pie chart shows the number of seats that each party has in the lower house of the parliament. Study the diagram and answer the following questions.
If the data shows the seats of all the parties then the lower house of parliament has how many seats in total?
Calculate the length (in cm) of PQ, if the radius of the circle is 7 cm and the line through the centre O meets the tangent at point Q such that OP = 25 cm.