State ‘T’ for true and ‘F’ for false.
(i) 12 hours : 30 hours = 8 km : 20 km
(ii) The ratio of 1 hour to one day is 1 : 1.
(iii) The two terms of a ratio can be in two different units.
in first part we cannot compare unless the units are same.
The given figure (not drawn to scale) shows a semi-circle centred at O and a rectangle. Find the total area of shaded parts.