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No bird is reptile (E) + Few reptiles are amphibians (I) → Some amphibians are not bird (O*) → Probable conclusion → All bird may not be amphibians (O). Hence conclusion I follows. Mostly animals are birds (I) + No bird is reptile (E) → Some animals are not reptiles (O). Hence conclusion II does not follow.
The circumference of the two circles is 120 cm and 428 cm respectively. What is the difference between their radii?
In a triangle, PT is tangent and PAB is secant which cuts on a circle at points A & B. If PT= 12 cm, PA= 8 cm then find the legth of AB.
A circle touches all four sides of a quadrilateral. If AB = 18 cm, BC = 21 cm, and AD = 15 cm, then what is the length of CD?
If a wheel covers a distance of 2200 cm in 7 rotations, then the diameter of the wheel is?
A semicircle has a radius of 7 cm. What is the perimeter of the semicircle?
The minute hand of a clock is 28cm long. Find the area on the face of the clock swept by the minute hand between 8 a.m. and 8: 45a.m
Find out the circumference of a sector whose radius is 7 cm and it makes the angle of 45° at the centre.