Q8. A horse is tied to a peg at one corner of a square shaped grass field of side 15 m by means of a 5 m long rope. Find the increase in the grazing area if the rope were 10 m long instead of 5m.

Q7. A broach is made with silver wire in the form of a circle with diameter 35 mm. The wire is also used in making 5 diameters which divide the circle into ten equal sectors. Find the total length of the silver wire required.