Question

( left(0^{prime}right) ) 4hr
( Q=6 mathrm{m} )
( R=gamma ln r )
Sffeetwe ( =frac{1}{4}+frac{1}{6}-frac{1}{x}=frac{1}{24} )
[
begin{aligned}
frac{1}{x} &=frac{1}{4}+frac{1}{6}-frac{1}{29}
&=frac{9}{24} h
x &=frac{24}{9} h^{8}
&=2 text { hr } frac{2}{3} times 60 text { in }
&=2 text { wr } i text { abmen }
end{aligned}
]

# u Uu- ce 63. The pipes P and Q take 4 hrs and 6 hrs to fill a tank respectively. When waste pipe R is opened with P and Q the empty tank is filled in 24 hrs. In what time does waste pipe R empty a full tank of water? a) 2 hrs b) 2hrs. 30 mm. c) 2 hrs. 40 mm d) 4hrs.

Solution