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?

In an election,10% of the voters on the voters list did not cast their vote and 60 voters cast their ballot papers blank.There were only two candidates.The winner was supported by 47% of total votes in the voters' list and he got 308 votes more than his rival.The number of voters on the voter list is

In a race of 100m,A beats B by 4m and A beats C by 2m.By how many metres can C beat B in another 100m race assuming C and B run with their respective speeds as in the earlier race?

A number consists of 2 digits.The sum of the digits is 7.If the digits are reversed,the number is increased by 27.The product of the digits of the number is