The height of a light house is 20 mts above sea level. The angle of depression (from the top of the lighthouse) of a ship in the sea is 30 deg. What is the distance of the ship from the foot of the light house?
A particle experiences constant acceleration for 20 s after starting from rest. If it travels a distance X1, in the first 10 s and distance X2 in the remaining 10 s, then which of the following is true?
Present age of Ashok is twice the present age of Kishan. After 7 years the Kishan’s age will be 4 times of the Kartik’s present age. If Kartik celebrated his 9th birthday 3 years ago, then what will be the present age (in years) of Ashok?