A person, standing on the bank of a river, observes that the angle ...
A person , standing on the bank of a river observer that the angle subtended by tree on the opposite bank is, when he retreats 40 meters from the bank, he finds the angle to be . the height of the tree and the breadth of the river are :
A person standing on a road has to hold his umbrella at
A person standing on a road has to hold his umbrella at 60 o with the vertical to keep the rain away. He throws the umbrella and starts running at 20 m s − 1. He find that rain drops are hitting his head vertically. Find the speed of the rain drops …
A person standing on the bank of the river observes that the
A person standing on the bank of a river observes that the angle of elevation of the top of a tree standing on the opposite bank is 6 0 o. When he moves 40 m away from the bank, he finds the angle of elevation to be 3 0 o. Find the height of the tree and the width of the river. (3 = 1. 7 3)
A person standing on the bank of a river observes that the ... - Toppr
A person standing on the bank of a river observes that the angle of elevation of top of building of an organisation working for conservation of wild life standing on the opposite bank is 60. When he moves 40m away from the bank, he finds the angle of elevation to be 30. Find the height of the building and width of the river.
A movie camera with a (single) lens of focal length - Toppr
A movie camera with a lens of focal length 75 mm takes a picture of a 180 cm tall person standing 25 m away. What is the height of the image of the person on the film? (Assume the distance of the person from camera to be very large as compared to its focal length)
A person standing on the floor of an elevator drops a coin. The …
A person standing on the floor of an elevator drops a coin. The coin reaches the floor of the elevator in time t1 if the elevator is stationary and in time t2 if it is moving uniformly. Then (a) t1 = t2 (b) t1 < t2 (c) t1 > t2 (d) t1 < t2 or t1 > t2 depending on whether the lift is going up or down.
A person standing on the bank of the river observes that the
A person standing on the bank of the river observes that the angle of elevation of the top of a tree standing on the opposite bank is 60 ∘.When he was 40 m away from the bank he finds that the angle of elevation to be 30 ∘.Find
A person standing on the bank of a river observed that the angle ...
A person, standing on the bank of a stream, observes that the angle subtended by a plant on the opposite bank is 60 0. When he moves 50 m away from the bank, he finds that the angle of elevation to be 30 0. Find the breadth of the stream.
Person'A' is standing a distance of 10 mathrm{m} from a plane
Another person'B' is standing at a distance of $$15 \mathrm{m}$$ from $$\mathrm{A}$$ and at a distance of $$10 \mathrm{m}$$ from the mirror. Find the distance between Person'A' and the image of Person B. between Person'A' and the image of Person B. O $$15 \mathrm{m}$$ O $$25 \mathrm{m}$$ O $$25 \mathrm{m}$$ O $$30 \mathrm{m}$$
A person is standing in an elevator. In which situation he ... - Toppr
Person will feel his weight less when the lift goes down with some acceleration. N=m(g−a) where a is the downward acceleration. The weighing machine will read m(g−a)