Question
Two trains approach each other at 20 kmph and 25 kmph
from 2 places 225 km apart. After how many hours they will meet?Solution
Distance = 225 km Speed of train 1 = 20 km/hr Speed of train 2 = 25 km/hr Relative speed = 20 + 25 = 45 km/hr Therefore, speed = distance/time ⇒ 45 = 225/Time ⇒ Time = 225/45 = 5 hrs
A person 'P' is 4 years younger than 'Q' and also 10 years less than twice the age of 'R'. Given that the ages of 'Q' and 'R' are in the ratio 5:3, dete...
A person travels from city A to city B at 60 km/h and returns at 40 km/h. If the total time taken for the round trip is 6 hours, find the distance betwe...
If sinā¶ Ā x + cosā¶Ā x = 7/8, find sinā“ Ā x + cosā“ Ā x:
Determine how many composite numbers exist between 61 and 99?
The value of tan 225Ā° is same as the value of:
In a survey of 200 people: 112 like coffee (C), 125 like tea (T), 90 like juice (J). 60 like both C and T, 55 like T and J, 52 like C and J. If 30 like ...
In the given question, the given two series following the same pattern, then find the pattern used in the 1st series and use the pattern to find the unk...
A bag contains 8 black and 10 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
The average age of 8 colleagues is 16 years. When 2 new colleagues join the average age increases by one year. Find the average age of the new colleague...
Relevant for Exams:
