If 2 4 6 x 14 28 30

Then, x³+ 2 x+1 = ?

2(× 2), 4(+2), 6 (× 2), 12 (+2), 14 (× 2), 28 (+2), 30 Hence, x= 12 Hence, x³+ 2 x +1 = (12)³+ 2 × 12 + 1 = 1,728 + 24 + 1 = 1,753

How many bullets can be made out of a lead cylinder 32cm high and 12 cm radius, each bullet being 4 cm in diameter?

The angle of elevation of a pole from a point, which is 20 m away from the foot of the pole is 45°. Find the height of the pole.

The volume and height of a cylinder are 7986 cm

^{3}and 21 cm. Find the radius of the cylinder.

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