Question
A,B and C run around a Circular track starting from the
same point simultaneously and in the same direction at the speed of 8 kmph, 12 kmph and 16 kmph respectively. If the length of the track is 800 metre, when will A, B and C meet at the starting point for the first time after they start the race?Solution
8km = 8000 m A makes it around the track 10 times (8000/800) in an hour Similarly B = 15 times and C = 20 times in an hour In 60 minutes, A will complete track once every 6 minutes, B once every 4 minutes and C once every 3 minutes LCM of A,B,C = LCM(6,4 & 3)= 12Â Alternative:Â Time = Distance/Speed Time for A = 0.8/8 hours Time for B = 0.8/12 hours Time for C = 0.8/16 hours LCM of A,B,C = (LCM of numerator)/(HCF of Denominator) = (LCM of 0.8,0.8,0.8)/(HCF of 8,12,16) = 0.8/4 hours 0.8/4 hours = 12 minutes
If each letter of the word ‘DEFINITION’ is replaced by its immediate succeeding letter in the alphabetical series, then which of the following is t...
If in the word ‘CELEBRATION’, all the consonants are changed to their immediate succeeding letters and all the vowels are changed to their opposite...
If the word 'SUBTRACTION' is arranged in alphabetical order from the right end, then which of the following letters will be the third letter to the righ...
How many such pairs of letters are there in the word ‘DEPARTMENT’ each of which has as many letters between them in the word as in the English alpha...
If all the prime digits of the number 9745976129 are written first (in increasing order) followed by even digits(in increasing order) and then odd digit...
If all the vowels of the word ‘SIGNATURE’ are replaced by their immediate succeeding letters and all the consonants are replaced by their immediate ...
Which of the following letter will be 5th letter from the left end if the letters at even positions are replaced by succeeding letter in the ...
If in the word ‘GRAPHICAL’ all vowels are replaced with the preceding letter and all the consonant are replaced with the succeeding letter accordin...
- In the word ‘HERITAGE’ how many pairs of the letters have the same number of letters between them in the word as in alphabetical series?
If we arrange all the letters of the word ‘HESITATION in alphabetical order from the left end, then, how many letters will remain at same position aft...
