A man of height 160 cm walks at a rate of 1.1` m/sec from a lamp post which 6m high. Find the rate at which the length of his shadow increases when he

Question

A man of height 160 cm walks at a rate of 1.1` m/sec from a lamp post which 6m high. Find the rate at which the length of his shadow increases when he

A man of height 160 cm walks at a rate of 1.1` m/sec from a lamp post which 6m high. Find the rate at which the length of his shadow increases when he is 1m away from the lamp post.

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

Related Questions

A particle falls from the top of a tower and it cover `(3)/(25)` of the total height from `t=2` sec to t=4 sec. The height of the tower is:-

2 Answers 4 Views

`d/(dx)sqrt((1-sin2x)/(1+sin2x))i se q u a lto,(0<x<pi/2),` `sec^2x` (b) `-sec^2(pi/4-x)` `sec^2(pi/4+x)` (d) `sec^2(pi/4-x)`

2 Answers 5 Views

A man of height 1.8 m is standing in front of a wall. The sun is exactly behind him. His shadow has a length 1.5 m on the ground and 0.75 m on the wal

2 Answers 8 Views

In the grease spot photometer, a lamp with dirty chimney is found to balance an electric lamp of constant illuminating power at a distance of `0.1` m

2 Answers 5 Views

A lamp of luminous intensity 50 candela is placed at a distancde of 1 m from a wall What is the illuminacnce of the wall directly in front of lamp ? I

2 Answers 6 Views

A 60W lamp is rated at 0.8 watt/candela. Calculate (i) luminous intensity of the lamp, (ii) luminous flux of the lamp, and (iii) illuminance at a dist

2 Answers 4 Views

A lamp is hanging along the axis of a circular table of radius r. at what height should the lamp be placed above the table so that the intensity of il

2 Answers 7 Views

The length of a rectangle is decreasing at a rate of 3 cm/sec and breadth is increasing at a rate of 4 cm/sec. Find the rate of change of its (a) peri

2 Answers 5 Views

From the top of a building `A B` , 60 m high, the angles of depression of the top and bottom of a vertical lamp post `C D` are observed to be `30o` an

2 Answers 5 Views

A vertical pole of length `7.5 m ` casts a shadow 5 long on the ground and at the same time a tower casts a shadow 24 m long. Find the height of the t

2 Answers 6 Views

Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - `0.4 m//sec`

5 views Answered 2023-02-05 15:29