Numerical Appli...

Small tap require $$18\ hrs$$. to fill the tank white big tap require $$12\ hrs$$. to fill the tank. In how many hrs. both taps would fill the tank together?

A and B can do a piece of work in $$8$$ days and
$$12$$ days respectively. How long will they take
to finish it they work together?

$$18$$ men can reap a field in $$35$$ days. For reaping the same field in $$15$$ days, how many men are required?

Working together, pipes $$A$$ and $$B$$ can fill an empty tank in $$10\ hours$$. they worked together for $$4$$ hours and then $$B$$ stopped and $$A$$ continued filling the tank till was full. It took a total of $$13\ hours$$ to fill the tank. How long would it take $$A$$  to fill the empty tank alone?

If $$200$$ students take $$40$$ days to complete the project, how much time will be taken by $$250$$ students?

The number of seven letter words that can be formed by using the letters of the word  $$SUCCESS$$  that the two  $$C$$ are together but no two  $$S$$  are together is

4 men and 6 woman get Rs 1600 by doing a piece of work in 5 days. 3 men and 7 woman get Rs 1740 by doing the same work in 6 days. In how many days, 7 men and 6 woman can complete the same work getting Rs  3760?

Pipe $$A$$ can fill one fourth of a tank in $$5$$ hours and pipe $$B$$ can empty the full tank in $$30$$ hours.If both pipes are opened simultaneously, then in how many hours will the empty tank be filled.

$$6$$ pipes are required to fill a tank in $$1$$ hour $$20$$ minutes. How long will it take if only $$5$$ pipes of the same type are used?

A train 100 meters long takes 6 seconds to cross a man walking at 5km/h in a direction opposite to that of the train. The speed of the train is