Question

why is the capacity of a rectangular tank is 189 kilo litres it is 7 metre long and 4.5 metre high find its breadth

Answer 1

189 kilo litre=189m^3
So volume of tank=189 m^3
7×4.5×X=189
So, X=189÷31.5=6 m
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Answer 2

given,
length=7m
height=4.5m
breadth=?
volume =189 kilolitres
volume=189000 litres
volume=189000/1000 (if 1m holds 1000 litres)
volume=189 m
lbh=189
7×4.5×b=189
b=189/7×4.5
b=189/31.5
b=6m