Question
A cheetah spotted a fox running away at 6 m/s and
started chasing it at 10 m/s. The fox was 120 metres ahead at that moment. Find the time taken by the cheetah to catch the fox.Solution
Relative speed of cheetah w.r.t fox = 10 − 6 = 4 m/s
So, required time = 120 ÷ 4 = 30 seconds
A box contains only three colors of balls- red, green and blue. What is the minimum number of balls that should be picked from the box to ensure that at...
A bag contains 15 white and some black balls. If the probability of drawing a black ball from the bag is thrice that of drawing a white ball, fin...
A box contains 6 red balls, 4 blue balls, and 5 green balls. If two balls are drawn at random, what is the probability that one is red and the other is ...
18 rotten bananas are accidentally mixed with 132 good ones. It is not possible to just look at a banana and tell whether or not it is rotten. One banan...
- Raman has three children and he truthfully says, "at least one of my children is a girl." What is the probability that all of his children are girls?
Bag M contains 2 red balls and 4 blue balls, whereas bag N contains 5 red balls and 2 blue balls. One ball is drawn at random from M and transferred int...
- 10 defective calculators got mixed with 90 non-defective calculators. A student takes one calculator randomly. Find the probability that the calculator is ...
A bag contains 10 black and 12 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
A bag contains 5 red balls, 6 blue balls, and 9 green balls. Two balls are drawn at random without replacement. What is the probability that both balls ...
A box contains Z black balls and 7 white balls. If two balls are drawn at random, one after another without replacement, and the ...
Relevant for Exams:
