In a rhombus, the length of the two diagonals are 40m and 30m respectively. Its perimeter will be

A certain sum is lent at a certain rate of compound interest. It grows to 1.44 times its value in 2 years. If the same sum is lent at simple interest at the same rate, in how many years would it double itself?

The length of canvas 1.1 m wide required to build a conical tent of height 14m and the floor area \(346.5\ m^2\) is

A man pays 40 times the annual rent to purchase a building. The rate % per annum he derives from his investment is

One cubic meter of iron weighs 7.800 kg. The weight of iron in a pipe of length 4 m, whose interior and exterior diameters measure 10 cm and 12 cm respectively, is nearly

A mixture of alcohol and water contains 35% alcohol by weight. If 25 g water is added to such a mixture of 100 g, then the percentage of alcohol in the mixture is

In a flat race, A beats B by 15 m and C by 29 m. When B and C run over the same course together, B wins by 15 m. The length of the course is

A man rows 20 km upstream and back again to the starting point in 110 minutes. If the speed of stream is 2 kmph, then the speed of rowing in still water is

At what angle the hands of a clock are inclined at 15 minutes past 5 ?