Question

solve the following fast ​

Answer 1

Answer:

a)20% of 75

$\frac{20}{100} \times 75 \\ = \frac{1}{5} \times 75 = 15$

b)bought price of 10 eggs=8 Rs/- (cost price)

sold price of 4 eggs=5 Rs/- (selling price)

so sold price of 10 eggs

$\frac{5}{4} \times 10 \\ = 5 \times 2.5 = 12.5$

gain =(selling price - cost price)

=(12.5-8)

=4.5

gain%=(gain/cost price )×100

$\frac{4.5}{8} \times 100 \\ = \frac{450}{8} = 56.25\%$

c) assume the angle be in the form x,2x and 3x

we know that sum of the angles of a triangle =180

so

x+2x+3x=180

=>6x=180

=>x=30

so the 3 angles are

x=30

2x=2×30=60

3x=3×30=90

(this is a right angled triangle )

e)(x/12)=(3/4)

=>4x=12×3=36

=>x=36/4=9

f) a cricket team played 16 matches

it won 75% of 16 matches

that is it won

(75/100)×16=12 matches

so the team loose 16-12=4 matches

g) complement angle means sum of two angle equal to 90

let x+y=90

y=90-x

according to the question

x=4y=4 (90-x)=360-4x

=>5x=360

=>x=72

y=90-72=18