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Or

Calculate the area other than the area common between two quadrants of circles of radius 16 cm each, which is shown as the shaded region in Fig. 6.

Sol. Area of quad.=
=

Area of the shaded region
= 2[ ar of square-ar of quadrant]
= 2
= 2
=2(54.86)=109.72cm²

SECTION D

Questions number 26 to 30 carry 6 marks each.

Q. 26 A motorboat whose speed in still water is 5 km/h, takes 1 hour more to go 12 km upstream
than to return downstream to the same spot. Find the speed of the stream.

Mathematics 2009 Question Papers Class X
Delhi		Outside Delhi		Compartment Delhi		Outside Delhi		Foreign
	Set 1 (PDF)		Set 1 (PDF)		Set 1		Set 1		Set 1 (PDF)
					Set 2		Set 2
					Set 3		Set 3