Question

a swimming pool has 4 inlet pipes. Each pipe can full the swimming full in 15 hours how long will it take to full up the swimming pool of all pipes were opened simultaneously..
plzzzzzz answer it guys​

Answer 1

Answer:

3hours 45minutes

Step-by-step explanation:

work done by each pipe=15 hrs

in 1h the pipe works=1÷15

so if 4 pipes are opeaned=1÷15+1÷15+1÷15+1÷15

=15÷4