A skating champion moves along the circumference of a circle of radius 28 m in 44 sec. How many seconds will it take her to move along the perimeter of a hexagon of side 48 m ?
Options:
A . 48 sec
B . 68 sec
C . 72 sec
D . 84 sec
E . 90 sec
Answer: Option C Distance mode by the skater in 44 sec = Circumference of the circle = $$\left( {2 \times \frac{{22}}{7} \times 28} \right)$$ m = 176 m Speed of skater : = $$\left( {\frac{{176}}{{44}}} \right)$$ m/sec = 4 m/sec Perimeter of hexagon : = (6 × 48) m = 288 m ∴ Required difference : = $$\left( {\frac{{288}}{{4}}} \right)$$ sec = 72 sec
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