Question

3. Twenty years from now, Rani would be three times her present age. Find her present age. 4. A man sold an article for Rs.432 and gained one-third of its cost price. Find the cost price. 5. A number is as much greater than 17 as it is less than 47. Find the number. 6. Divide 96 into two parts such that half of one part is equal to the other part.
7. The length of a rectangle is 5cm more than its breadth. If the perimeter of the rectangle is 30cm. find the dimensions.​

Answer 1

Answer:

3) 60 yrs

Step-by-step explanation:

20 yrs X 3 = 60yrs

4) 144

1/3 of 432 is 144

5) 32

x-17 = 47-x                        

x+x-17 = 47

2x-17 = 47

2x = 47+17

2x = 644

x = 64/2

x = 32

6) 48

96/2 = 48

48+48= 96

7) length = 10, breadth = 5

breadth= x

length = x + 5

perimeter of rectangle = 2x (l+b)

2 X x = 2x

2 X x+5= x + 10

30-10 = 20/2= 10= length

30-20=10/2=5= breadth

2x10+5 = 30