A boy is cycling such that the wheels of the cycle are making 140 revolutions per minute.If the radius of the wheel is 30cm,the speed of the cycle is

A square and equilateral triangle have equal perimeter.If the diagonal of the square is 12√2 cm,then the area of the triangle is

The speeds of three buses are in the ratio 2:3:4.The time taken for these three buses to travel same distance will be in the ratio

A hollow cylindrical drum has internal diameter of 30cm and a height of 1m.What is the maximum number of cylindrical boxes of diameter 10cm and height 10cm each that can be packed in the drum?

A pipe with square cross-section is supplying water to a cistern which was initially empty.The area of cross-section is 4cm² and nozzle velocity of water is 40m/s.The dimensions of the cistern are 10m *8m*6m.Then the cistern will be full in

Consider all positive 2 digit numbers each of which when divided by 7 leaves a remainder 3.What is their sum?