JEE MATHEMATICS MCQ: DIFFERENTIATION

1 Easy

1 of 1

Application +4 | -1

A man who is

1.5 \mathrm{~m}

tall walks away from a lamp which is

3 \mathrm{~m}

above the ground at the rate of

30 \mathrm{~m} / \mathrm{min}

the shadow lengthening at

\mathrm{K} \mathrm{m} / \mathrm{min}

. Then

\mathrm{K}=

View answer and explanation

Correct option: D

Option D (30) is correct because the rate at which the shadow lengthens is equal to the rate at which the man walks away from the lamp.

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