Question

Please help me solving question

Answer 1

Here is your answer..........

13..

strength of school = 1800

let the no. of girls in the school be x

then no. of boys will be = 200 + x

strength of school = no. of boys + no. of girls

1800 = 200 + x + x

1600 = 2x

x = 800

i.e. no. girls = 800

and no. of boys = 800 + 200 = 1000.....

14...

let the length of the rectangular plot be x

then its width or breadth will be x/2

we know that....

perimeter of rectangle = 2(l+b)

360 = 2(x + x/2)

180 = 3x/2

360/3 = x

x = 120 m

i.e. the length of rectangular plot = 120 m

then width of rectangular plot = 120/2 = 60 m.........

15....

let the smallest angle be x

the 2nd angle or we can say that largest angle = 2x

3rd angle = x + 8

we know that...............

the sum of all the three angles of a triangle is 180 degrees

so,

x + 2x + x + 8 = 180

4x = 172

x = 43

therefore the angles of triangle are.....

1st angle = x = 43

2nd angle = 2x = 86

3rd angle = x + 8 = 51

Hope this will help you...........

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