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Maths-

General

Easy

Question

A circular metal plate is heated so that its radius increases at a rate of 0.1 mm per minute. Then the rate at which the plate’s area is increasing when the radius is 50 cm is

$10 π \frac{m m}{m i n u t e}$
$100 π \frac{m m}{m i n u t e}$
$π \frac{m m}{m i n u t e}$
$- π m m / m i n u t e$

The correct answer is: $100 blank pi fraction numerator m m over denominator m i n u t e end fraction$

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