The circumference of the front wheel of a car is 4m and that of the back one is 5m. How much distance does the car need to go so that the front wheel can revolve 42 times more than the back one?The circumference of the front wheel of a car is 4m and that of the back one is 5m. How much distance does the car need to go so that the front wheel can revolve 42 times more than the back one?

step-by-step explanation: it is d

step by step resolutions

1) n+n+1+n+2=51

3n+3=51

3n=48

n=16

the three numbers are 16, 17 and 18.

2) x+15=4x

3x=15

x=5

radha is now 5 years old

3) the two digits are x and y.

y=3x

(10x+y)+(10y+x)=88

y=3x

11x+11y=88

y=3x

x+y=8

x+3x=8

x=2

the original number can be either 28 or 82.

4) n+(n+2)+(n+4)=48

3n+6=48

3n=42

n=14

the numbers are 14, 16 and 18.

5) y=x+3

10y+x+10x+y=143

y=x+3

11x+11y=143

y=x+3

x+y=13

x+x+3=13

2x=10

x=5

the original number can be 57 or 75.

hope this !

1k

step-by-step explanation:

-6k+7k

(-6+7)k

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