Question
A race track is in the shape of a rectangle with length
of 22 metres and area of 2200 m2. A car takes 20 seconds to make one lap around the perimeter of this track. If the car and a person whose speed is 4 m/s, started moving at the same time along the perimeter of the track but in opposite directions, then find the distance between the car and the person, 3 seconds before they cross each other.Solution
Area of the track = length of track x breadth of track = 22 x breadth of track = 2200 So, breadth of track = 2200 ÷ 22 = 100 So, perimeter of the track = (22 + 100) x 2 = 244 metres So, speed of the car = (244/20) = 12.2 m/s Relative speed of the car with respect to the person = 12.2 + 4 = 16.2 m/s So, distance between the car and the person, 3 seconds before they cross each other = 16.2 x 3 = 48.6 metres
He is always praised for his gift of the gab.
Hang in there
Contain commonly used idioms and phrases in the English language. In each case, choose the option representing the correct meaning of each of ...
When two heavyweights have an argument, its best to sit on the fence and not make either of the turn against you.
Cool heels
- Read the sentence carefully and select the most suitable idiom to fill in the blank.
Despite all the warnings, he continued to take unnecessary ris... In each of the following questions, an idiomatic expression/a proverb has been underlined – followed by four alternatives. Choose the one which best ...
- In each of the following questions, an idiomatic expression or a proverb has been given in bold . Choose the option that best expresses its meaning.
to chew the cud
Fill in the blanks with the correct idiom.
The new employee had no experience in the field, but he quickly adapted and showed that he was a ___...
Relevant for Exams:
