Question
In a group of students, the number of girls is
three-fourth of the number of boys. If two-third of the number of girls and one-half of the number of boys like mango juice, then what fraction of the total number of girls and boys like mango juice?Solution
Let the total number of boys be 400. number of girls =300 (3/4X400=300) number of girls like mango juice=2/3 x 300=200 number of boys like mango juice=1/2 x 400=200 Total number of girls and boys who like mango juice (200+200) =400 Total number of girls and boys=700 Fraction of the total number of girls and boys who like mango juice= total number of girls and boys who like mango juice/total number of boys and girls = 400/700 = 4/7.
The length of the each side of an equilateral triangle is 63√3 cm . The area of circumcircle, (cm 2 ) is
∆ABC and ∆DEF are similar and their areas are respectively 16 cm2 and 64 cm 2 . If EF = 6 cm BC is?
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