Prameela painted the outer surface of a cabinet of measures 1m `xx` 2 m `xx` 1.5m. Find the surface area she cover, if she painted all except the top and bottom of the cabinet?

Air is streaming past a horizontal aeroplane wing such that the speed of air is 120 m/s over the upper surface and 90 m/s at the lower surface, with respect to the plane. If the density of air is 1.3kg/ m^(3) , find the difference in pressure between the top and bottom of the wing. If the wing is 10m long and has an average width of 2m, calculate the gross lift of the wing.

An air bubble comes from the bottom to the surface of a lake of depth 2.5 m. The surface temperature of the lake is 40^(@)C . The diameter of the bubble at the bottom and at the surface are 3.6 mm and 4 mm respectively. Find the temperature of the lake at the bottom.

A block of mass M is placed on the top of a bigger block of mass 10M as shown in fig. All the surfaces are frictionless. The system is releated from rest. The distance moved by the bigger block by the time the smaller block reaches the ground is

A body of mass M kg is on the .top point of a smooth hemisphere of radius 5 m. It is released to slide down the surface of the hemisphere. It leaves the surface when velocity is 5 ms^-1 , At this instant the angle made by the radius vector of the body with the vertical is (acceleration due to gravity = 10 ms^-2 )

The height of a rectangular stockroom is 5m and perimeter of its floor is 50m. Find the outer area of the four walls to be painted.

An oil drum is in the shape of cylinder , whose diameter is 2m and height is 7m. The painter charges Rs 5 per m^2 to paint the drum. Find the total charges to be paid to the painter for 10 drums.