The towers of a bridge, hung in the form of a parabola havee their tops 30 meters above the road way and are 200 meters apart. If the cable is 5 meters above the road way at the centre of the bridge, find the length of the vertical supporting cable 30 meters from the centre.

A fly over bridge is in the form of a circular are of radius 30 m. Find the limiting speed at which a car can cross the bridge without losing contact with the road at the highest point. Assume the centre of gravity of the car to be 0.5 m above the road.

The vertical section of a road over a bridge is in the form of circle of radius 15.5 m. What will be the maximum velocity with which a car, whose centre of gravity is 0.5 m above the ground can cross the bridge without losing contact with the surface of bridge at the highest point ?

Two buildings are in front of each other on a road of width 15 meters. From the top of the first building, having a height of 12 meters, the angle of elevation of the top of the second building is 30^@ . What is the height of the second building?

A boy standing at a distance of 48 meters from a building observes the top of the building and makes an angle of elevation of 30^@ . Find the height of the building.

With an unknown resistance X in the left gap and a resistance of 30 Omega in the right gap of meter bridge . The null point is obtained at 40 cm from the left end of the wire . Find i) the unknown resistance and ii)the shift in the position of the null point , when the resistances in both the gaps are increased by 15 Omega .

Choose the correct option? The frequency of transmission of a radio station is 30MHz, the wavelength of the waves transmitted by the centre will be A. 5 meter B. 10 meter C. 15 meter D. 20 meter

With an unknown resistance X in the left gap and a resistance of 30 Omega in the right gap of meter bridge . The null point is obtained at 40 cm from the left end of the wire . Find i) the unknown resistance and ii)the shift in the position of the null point , when the resistance in each gap is shunted by a resistance of 8 Omega .

Two resistance x and y in the two gaps of a meter bridge give a null point dividing the wire in the ratio 2:3 . If each resistance is increased by 30Omega ,the null point divides the wire in the ratio 5:6 . calculate each resistance.

Two unknown resistances are connected in two gaps of a meter-bridge. The null point is obtained at 40 cm from left end. A 30Omega resistance is connected in series with the smaller of the two resistances, the null point shifts by 20 cm to the right end. The value of smaller resistance in Omega is

In balanced meter bridge, the resistance of bridge wire is 0.1Omega cm . Unknown resistance X is connected in left gap and 6Omega in right gap, null point divides the wire in the ratio 2:3 . Find the current drawn the battery of 5V having negligible resistance