Question

o Pipe X can fill a tank in 4 hours
QUIS while pipe Y can empty it in 6 hours. If both the pipes are
pened simultaneously, how long will it take to fill the tank?
A cistern can be filled by one tap in 8 hours, and by another in 4 hours. How long will it take
to fill the cistern if both taps are opened together? de Rolo
50 persons can do a piece of work in 18 days in how many days can the same piece of work
7 be done by 75 persons?
12 6 persons can complete the electric fittings in a building in 7 days. How many days will it
7 take if 21 persons do the same job?
Working 8 hours a day, Anu can copy a book in 18 days. How many hours a day should she
work so as to finish the work in 12 days?
4 A 270 m long goods train is running at 40.5 km/h. How much time will it take to cross a tree?
15. A train is running at 36 km/h. If it crosses a pole in 25 seconds, find its length.
16. A train 450 m long crosses a pole in 22 seconds. What is the speed of the train in km/h?
17 A 250 m long train is running at a speed of 55 km/h. In how much time will it cross a
platform of length 520 m?
18. A train moving at a speed of 80 km/h covers a certain distance in 4.5 hours. What should be
the speed of the train to cover the same distance in 3 hours?​

Answer 1

Answer:

answer as shown above..hope u get it