Home
Class 12
PHYSICS
A man of height 'h' is walking away from...

A man of height 'h' is walking away from a street lamp with a constant speed 'v'. The height of the street lamp is 3h. The rate at which the length of the man's shadow is increasing when he is at a distance 10h from the base of the street lamp is :

A

v/2

B

v/3

C

2v

D

v/6

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • GEOMETRICAL OPTICS

    AAKASH SERIES|Exercise PRACTICE SHEET (EXERICSE-I (LEVEL-II (ADVANCED) MORE THAN ONE CORRECT ANSWER TYPE QUESTIONS))|2 Videos

  • GEOMETRICAL OPTICS

    AAKASH SERIES|Exercise PRACTICE SHEET (EXERICSE-I (LEVEL-II (ADVANCED) LINKED COMPREHENSION TYPE QUESTIONS))|6 Videos

  • GEOMETRICAL OPTICS

    AAKASH SERIES|Exercise PRACTICE SHEET (EXERICSE-I (LEVEL-I (MAIN) STRAIGHT OBJECTIVE TYPE QUESTIONS))|11 Videos

  • ELEMENTS OF VECTORS

    AAKASH SERIES|Exercise QUESTIONS FOR DESCRIPTIVE ANSWERS|9 Videos

  • LAWS OF MOTION

    AAKASH SERIES|Exercise PRACTICE EXERCISE|98 Videos

Similar Questions

Explore conceptually related problems

A girl of height 90 cm is walking away from the base of a lamp-post at a speed of 1.2m//sec . IF the lamp-post is 3.6 m above the ground, find the length of her shadow after 4seconds.

A man of height 2 metres walks at a uniform speed of 5 km/h away from a lamp post which is 6 metres high. Find the rate at which the length of his shadow increases.

A man 6ft. Walks at a uniform rate of 4 miles per hour away from a lamp post of 20 ft. high. Find the rate at which (i) the length of his shadow increases and (ii) the tip of his shadow moves.

A person of height 2mt starts from a lamp post of height 5 mt and walks away at the constant rate of 6 km per hour. The rate at which his shadow inceases is

The slant height of a cone is fixed at 7cm. The rate of increase in the volume of the cone corresponding to the rate of increases of 0.3 cm/s in the hieght when h = 4cm is

A person of height 180 cm starts from a lamp post height 450 cm and walks at the constant rate of 4 km per hour. Find the rate at which his shadow increases.