Question

6) The angles of triangle are in ratio 3:2:7. Find each angle.
7) A bag contains Rs 1600 in the form of Rs 10 and Rs20 notes. If the ratio between the number of Rs 10 and
R$20 notes is 2:3. Find the total number of notes in all.
8) 8 men complete a work in 6 hours. In how many hours will 12 men complete the same work?
9) A and B working together can do a piece of work in 10 days. B alone can do same work in 15 days. How
long will A alone take to do same work.
10) On selling an article for Rs2640, a profit of 10% is made, Find CP of article and new SP in order to gain
15%.
11) The interest on sum of money at the end of 2-years is of the sum. What is the rate of interest?
12) Subtract the second expression from first
a.-2b+2c and b+3c
b.2a+b and a+b
13) Simplify -
a. 5(x-4)-3(x-4) + 7(x-4)
b. (-2x+3y)(2x-3y)
14) The difference between two numbers is 7. Six times the smaller plus the larger is 77. Find the numbers.
15) The base angles of isosceles triangle if 15° more than its vertical angles, Find its each angle.​

Answer 1

Answer:

6answer

3x+2x+7x=180

12x=180

x=15

Answer 2

Answer:

for ques 6 :-

3x= 45

2x=30

7x=105

Step-by-step explanation:

firstly take the ratio as 3x ; 2x;7x .

then , use the angle sum property :

3x+2x+7x=180

12x=180

x=180÷12

x=15

now ,

multiply the value of x in 3x ;2x;and 7x:

3x= 3×15=45

2x=2×15=30

7x=7×15= 105.