Two person A and B from same distance with speed time and same direction with speed of 48km/hr and 40km/hr .The speed of person B increased by ½ km every hr. after what time A and B will meet .
Let the time be = t hrs , speed be= 48 km/hr , distance = 48× t Distance travelled by B forms an AP = 40, 40½, 41, 41½ , ………………………. t terms Where First term is 40 and Common difference is 1/2 Now, Sum of n terms = Sn = n/2 [2a + (n-1)d] = distance covered by A Sn = t/2 [2 × 40 + (t-1) 1/2] 48t= t/2 [2 × 40 + (t-1) 1/2] 96 = 80 + (t – 1) 1/2 16 = (t – 1) 1/2 33 = t Therefore A and B will meet after 33 hours
How many such pairs of letters are there in the word ‘DISPLACED’ each of which has as many letters between them in the word (in both forwar...
How many such pairs of letter are there in the word INGREDIENTS, each of which has as many letters between them in the word as in the English alphabet?
A farmer has some hen and some cows. Find out the total number of hen if the total number of heads is 50 and the total number of feet is 160?
In a row of letters, a letter is 7th from left end and 15th from the right end. How many letters are there in a row?
Select the correct combination of mathematical signs to replace * signs and to balance the given equation.
5 * 5 * 5 * 3 * 10
If the position of the letters in the word “FORMALITIES” are rearranged in such a way that the position of S remains the same position, then...
Given below are four combinations [i], [ii], [iii] and [iv] of five words. In each combination you have to arrange the letters in English alphabetical o...
If all the letters of the word ‘SKETCHING’ are arranged in the alphabetical order starting from the left end then how many consonants appear at the ...
In the word ‘BAREFOOT’ all consonants are written as their preceding letter and all vowels are written as their following letters. Now all letters a...
The position of how many alphabets will remain unchanged if each of the alphabets in the word ‘DECREASE’ is arranged in alphabetical order from left...
