Mary is 15 years older then her niece Katie. In 10 years Mary is two times as old as katie. How old are Mary and Katie now?
1 answer:
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The painting's original price was $3,500.
Step-by-step explanation:
Step 1:
The price now is $500 lesser than 3 times the original price. So
The current selling price = (3 × original price) - $500.
If the current selling price is y and the original price is x, then
Step 2:
For this question, we have . Substituting this in the equation, we get
So the original price of the classic painting was $3,500.
The car moved 175.84 cm in one revolution
The car has moved 17584 cm in 100 revolutions
<em><u>Solution:</u></em>
Given that car wheel is 56 cm in diameter
diameter = 56 cm
To find: distance traveled in one revolution of wheel
Usually wheel is of circular shape
one revolution of wheel = circumference of circle
<em><u>The circumference of circle is given as:</u></em>
We know that,
diameter = 2(radius)
<em><u>So the circumference becomes:</u></em>
substitute = 3.14 and d = 56 cm
Thus the car moved 175.84 cm in one revolution
<em><u>B. How far does it go in 100 revolutions</u></em>
Distance covered in 100 revolutions = 100 x Distance covered in 1 revolution
Thus the car has moved 17584 cm in 100 revolutions