Question
Two person A and B started from same place and in same
direction with speed of 48km/hr and 40km/hr respectively .The speed of person B increased by ½ km every hr. after what time A and B will meet .Solution
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
Chief Minister of which state has inaugurated a project of the Women and Child Development department to provide milk and eggs to children at all angan...
Recently the union cabinet has extended “The Pradhan Mantri Awas Yojana (PMAY)” for how many years?
Noted singer Tansen, who lived in 16th century, was the disciple of which saint?
During the Second Five Year Plan, how many integrated steel plants were set up with foreign collaboration?
Which of the following ASEAN countries are also part of BIMSTEC?
1.   Myanmar
2.   Malaysia
3.   Thailand
4....
'A Grain Of Sand In The Hourglass of Time’ is an autobiography of which Indian politician?
Who was the founder of Arya Samaj?
In which of the following parts of Indian Constitution, the provision for setting up three tiers of Panchayats is provided?
Consider the following statements as per the latest report by the World Gold Council (WGC):
1. India is the world’s largest consumer of gold.
Which of the following is used to coat aircraft surfaces and metal cans to prevent rusting?
Relevant for Exams:
