Consider a circle of radius 42 cm. An insect crawls with uniform … - Vidyadip

MCQ

Consider a circle of radius $42\ cm$. An insect crawls with uniform speed of $1.3\ cm/s$ along the chord $AB$ then along the circular arc $BCD$ to reach point $D$ and then following cord $DA$ to reach finally $A$. Time spend by the insect to crawl from $A$ to $A$ is closest to ......... $\sec$

✓
$200$
B
$196$
C
$256$
D
$100$

✓

Answer

Correct option: A.

$200$

a
Distance ($D$) = $2R + 2 \pi R × \frac{2}{3} \ time = \frac{D}{v}$

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