Given:
The number of cycles is, n (s) = 7.
The number of wheels in the cycle is, n (sw) = 2.
The number of cars is, n (c) = 15.
The number of wheels in the car is, n (cw) = 4.
The obective is to find the total number of wheels.
The total number of wheels is,
[tex]\begin{gathered} T=n(sw)\cdot n(s)+n(cw)\cdot n(c) \\ =2\cdot7+4\cdot15 \\ =14+60 \\ =74\text{ whe}els \end{gathered}[/tex]Hence, there are 74 wheels in the block.
If there are x bicycles and y cars, the equatioin will be,
[tex]\begin{gathered} T=n(sw)\cdot x+n(ce)\cdot15 \\ T=2x+4x \end{gathered}[/tex]Hence, the number of wheels for x bicycles and y cars is 2x+4x.
