Home
Class 10
MATHS
A girl of height 90 cm is walking away f...

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

Text Solution

Verified by Experts

The correct Answer is:
`1.6m`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • TRIANGLES

    MBD -HARYANA BOARD|Exercise FILL IN THE BLANKS|4 Videos

  • SURFACE AREAS AND VOLUMES

    MBD -HARYANA BOARD|Exercise LONG ANSWER TYPE QUESTIONS|16 Videos

Similar Questions

Explore conceptually related problems

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

A girl of height 100 cm is walking away from the base of a lamp post at a speed of 1.9 m/s . If the lamp is 5 m above the ground , find the length of her shadow after 4 seconds (in metres )

Knowledge Check

  • 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 of the length of man's shadow is increasingwhen 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`

  • A man of height 1.8 metre is moving away from a lamp post at the rate of 1.2m//sec . If the height of the lamp post be 4.5 metre, then the rate at which the shadow of the man is lengthening is

    A
    `0.4m//sec`
    B
    `0.8m//sec`
    C
    `1.2m//sec`
    D
    None of these

  • 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 10 h from the base of the street lamp is

    A
    v/2
    B
    v/3
    C
    2v
    D
    v/6

    • Similar Questions

    Explore conceptually related problems

    A lamp is 3.3 m be the lamp post and CD= 110 cm tall walks away from the base of this lamp post at a speed of 0.8 m/s. find the length of the shadow of boy after 4 seconds.

    A lamb is 3.3 m above the ground. A boy 110 cm tall walks away from the base of this lamp at a speed of 0.8 m/s. Find the length of the shadow of the boy after 4 second.

    A man of height 180 cm is moving away from a lamp post at the rate of 1.2 meter per second. If the height of the lamp post is 4.5 meters, find the rate at which (i) his shadow is lengthening. (ii) the tip of the shadow is moving.

    The foot of a ladder is 6 m away from its wall and its top reaches a window 8 m above the ground, Find the length of the ladder.

    A man 2 metres tall walks away from a lamp post 5 metres height at the rate of 4.8 km/hr. The rate of increase of the length of his shadow, is

    Home
    Profile