If 70% of the students in a school are boys and the number of girls is 504,
then find the number of boys in the school.
5. A fort had a provisions for 150 men for 45 days After 10 days 25 men leave
the fort. How long will the food last at the same rate?
6. Find the value of the unknown angle.
20
30
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% of boys + % of girls = 100
70 + % of girls = 100
% of girls = 30
and,
number of girls =
100
%ofgirls
× total students
504=
100
30
× total students
⇒ total students =1680
∴ number of boys = total students − no. of girls
=1680−540
=1176
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