A man while going dowm in a escalator(which is miving down)
takes 50 steps to reach down and while going up takes 125
steps. If he goes 5 times faster upwards than downwards.
What will be the total no of steps if the escalator werent
moving.
- 13 Answers
- 27780 Views
- Cadence, CSC, CTS, I also Faced
- E-Mail Answers
Answer Posted / barinder
Let down speed = 1 step/sec; time taken = 50secs = 2t
So up speed = 5 steps/sec; time taken = 125/5 = 25secs = t
let speed of escalator = n steps/sec
by relative motion concept if we make escalator at rest
then
down speed = (1+n) steps/sec
up speed = (5-n) steps/sec
as time taken downwards is double time taken upwards but distance is same so upward speed will be twice the downward speed
2*(1+n) = (5-n)
n = 1 step/sec
down speed = 2 steps/sec
number of steps = 2*50 = 100 steps
| Is This Answer Correct ? | 2 Yes | 1 No |
Post New Answer View All Answers
The crew of a rowing team of 8 members is to be chosen from 12 men (M1, M2, …., M12) and 8 women (W1, W2,…., W8), such that there are two rows, each row occupying one the two sides of the boat and that each side must have 4 members including at least one women. Further it is also known W1 and M7 must be selected for one of its sides while M2, M3 and M10 must be selected for other side. What is the number of ways in which rowing team can be arranged.
Wind flows 160 miles in 330 min, for travelling 80 miles how much time does it require?
Albert and Fernandes have two leg swimming race. Both start from opposite ends of the pool. On the first leg, the boys pass each other at 18 m from the deep end of the pool. During the second leg they pass at 10 m from the shallow end of the pool. Both go at constant speed but one of them is faster. Each boy rests for 4 seconds at the end of the first leg. What is the length of the pool?
Three cards are drawn at random from an ordinary pack of cards. Find the probability that they will consist of a king, a queen and an ace.
gavaskar average in first 50 innings was 50 . after the 51st innings his average was 51 how many runs he made in the 51st innings
In a square, all the mid points are joined. The inner square is shaded.If the area of the square is A, what is the area of the shaded area?
In the combinations of 2,3,6,7 how many possible combinations divisible by 4?
2 oranges,3 bananas and 4 apples cost Rs.15 . 3 oranges 2 bananas 1 apple costs Rs 10. what is the cost of 3 oranges, 3 bananas and 3 apples ANs Rs 15.
Find the next letter in the series Q,W,E,R,T,--
one fast typist type some matter in 2hr and another slow typist type the same matter in 3hr. if both do combinely in how much time they will finish.
A trip takes 6 hours to complete. After traveling 1/4 of an hour, 1 3/8hours, and 2 1/3 hours, how much time does need to complete the trip? There are 30 socks in a drawer. 60% of the socks are red and the rest are blue. What is the minimum number of socks that must be taken from the drawer without looking in order to be certain that atleast two blue socks have been chosen?
There are two balls touching each other circumferentially. The radius of the big ball is 4 times the diameter of the small ball.The outer small ball rotates in anticlockwise direction circumferentially over the bigger one at the rate of 16 rev/sec. The bigger wheel also rotates anticlockwise at N rev/sec. what is 'N' for the horizontal line from the centre of small wheel always is horizontal.
WRITE A LEAVE LETTER TO YOUR MANAGER
f(X)= 2X-1 + f(X-1) if X is not equal to zeroandiff(X=0)=0, Value of f(16)+f(15)-480
2 Oranges,3 bananas and 4 apples cost rs.15 . 3 Oranges 2 bananas 1 apple costs rs 10. What is the cost of 3 oranges, 3 bananas and 3 apples
