revolution equation

The mirror of a flashlight is a paraboloid of revolution which is generated by a parabola opens to right and having the vertex at (0, 0). If the distance of the light bulb of the flashlight from the vertex is 4 cm , then choose the equation of the generator parabola. => x 2 = 16..

Find the surface area of revolution formed by revolving the curve given by parametric equations x = 3 t , y = 2 t - 1 from 2 ≤ t ≤ 5 around y -axis. => 63 π square units or 1 3 π square units or 63 1 3 π square units or 63 1 3 square units..

Give the radian measure of an angle with 2 clockwise revolutions in standard position. => π or - 4 π or 4 π or 2 π..

A road-roller levels 75.5 yards in 5 revolutions. Find the length of the road leveled in one revolution. => 20.1 yards or 17.1 yards or 10.1 yards or 15.1 yards..

How many revolutions will a wheel of diameter 3 m make to cover a distance of 47.10 m? => 4 or 5 or 6 or 7..

The diameter of a cart wheel is 4.3 m. How much distance will it cover if it makes 10 revolutions? => 49 π m or 48 π m or 43 π m or 47 π m..

The radius of a bicycle wheel is 50 cm. How many revolutions does the wheel make when the bicycle travels 270 m? [Take π = 3.] => 81000 revolutions or 180 revolutions or 90 revolutions or 360 revolutions..

Write the degree measure of an angle with 1 6 clockwise revolution in standard position. => 60 o or - 60 o or 6 o or - 6 o..

A boy is playing with a ring of diameter 80 cm. It rolled down from his hands and made 12 revolutions while moving in a straight line and then came to stop. The boy normally covers a distance of 0.4 m in one step. How many steps he has to move to collect the ring? [Take π = 3.] => 74 s..

The diameter of a roller is 110 cm and its length is 150 cm. It takes 800 complete revolutions to move once over a play ground to level it. Find the area of the play ground. [Take π = 3.] => 1980 m² or 4686 m² or 3960 m² or 1320 m²..