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Unformatted text preview: of 120 2. A chem ical plant has four tanks (A, B, C and D), each containing 1000 litres of a chem ical. The chem ical is
being pum ped from one tank to another as follows :
From A to B @ 20 litres /m inute
From C to A @ 90 litres /m inute
From A to D @ 10 litres /m inute
From C to D @ 50 litres /m inute
From B to C @ 100 litres /m inute
From D to B @ 110 litres /m inute
Which tank gets em ptied firs t and how long does it take (in m inutes ) to get em pty after pum ping s tarts ?
a . A, 1 6 .6 6
b . C , 20
c. D, 2 0
d . D, 2 5
e .No t Atte mp te d 3. Two identical circles inters ect s o that their centres , and the points at which they inters ect, form a s quare of
s ide 1 cm . The area in s q. cm of the portion that is com m on to the two circles is
a . π/4
b . π/2 - 1
d . √2 - 1 ››
m o re Re ce nt Com m e nts
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m o re Sponse re d Links e .No t Atte mp te d 4. A jogging park has two identical circular tracks touching each other, and a rectangular track enclos ing the two
circles . The edges of the rec...
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