Page 118 - NUMINO Challenge_D1
P. 118
Problem solving
1 A quarter and a nickel are placed as shown below. Key Points
If the quarter completes 10 revolutions or turns
around the nickel, what is the distance that the The diameter of the
center of the quarter has moved? (The diameter of circle made by the
the quarter is 2.42 cm, and the diameter of the quarter's revolutions
nickel is 2.12 cm.) around the nickel is
equal to the sum of
the diameters of
both coins.
2 Here is a running track at a local elementary The straight line
school. The length of the inner track is 400 m. If sections on the
the track is 2 m wide, what is the length of the inner and outer
outer track? tracks have the
same length.
2m
115Measurement
1 A quarter and a nickel are placed as shown below. Key Points
If the quarter completes 10 revolutions or turns
around the nickel, what is the distance that the The diameter of the
center of the quarter has moved? (The diameter of circle made by the
the quarter is 2.42 cm, and the diameter of the quarter's revolutions
nickel is 2.12 cm.) around the nickel is
equal to the sum of
the diameters of
both coins.
2 Here is a running track at a local elementary The straight line
school. The length of the inner track is 400 m. If sections on the
the track is 2 m wide, what is the length of the inner and outer
outer track? tracks have the
same length.
2m
115Measurement
