1.

Diameter of a car wheel is 49cm . find how many turns will it take to cover a distance of 3080 cm.

Answer» DIAMETER of wheel = 49 cm

Radius = 49 /2 cm

Circumference of wheel = 2 PI r

= 2 × 22 × 49 / 7 × 2

= 22 × 7

= 154 cm

Distance covered = 3080 cm

Number of TURNS = Distance travelled / Circumference of wheel

= 3080 / 154

= 20


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