Question
A carriage travels in the fog passed along a man who
was walking @ 3kmph in the same direction. He could see the carriage for 4 minutes and it was visible to him upto a distance of 100 metres. What was the speed of carriage?Solution
60 min = 3,000 4 min = 3000/60 × 4 ⇒ 200 Carriage ⇒ 4 min = 300 60 min = 300/4 × 60 ⇒ 4500 Speed = 4.5kmph Alternate Method: (d₁)/(d₂) = (S₁)/(S₂) 300/200 = (S₁)/3 ⇒ S₁ ⇒ 9/2 = 4.5kmph
Which one of the following statement regarding the sun is correct?
Which organ in the human body is primarily responsible for filtering blood?
The absolute zero is a temperature at which -
Which of the following is/are correct?
1. Displacement current can exist in vacuum
2. Magnetic field can exist without electric f...
Biogas which is used for cooking purpose is a mixture of which of the following two components?
Trans fats are considered unhealthy because they:
Who defined the law of gravitation?
Which of the following statement is correct?
I. Blood is a type of connective tissue
II. Bone is a type of connective tissue
A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole?
Which of the following is a 'Universal Blood Recipient' group?
Relevant for Exams:
