Question

The tank at a water supply station is filled with
water by several pumps. At first, three pumps of the
same capacity are turned on 2.5 h later, two more
pumps (both the same) of a different capacity are
set into operation. After 1 h the additional pumps
were set into operation; the tank was almost filled
to its capacity (15 m’ were still lacking); in another
hour, the tank was full. One of the two additional
pumps could have filled the tank in 40 h.
what is the volume of tank
(1) 60m^3
(2) 80m^3
(3) 75m^3
(4) 90m^3
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Answer 1

Answer:

this is a very long question u ask in this utube or