Question
‘A’ can do 30% of the work in 12 days. ‘B’ can
do the whole work in 50 days. Find the time taken by them together to do 75% of the work.Solution
Time taken by ‘A’ to complete the whole work. = 12/0.30 = 40 days Time taken by ‘B’ to complete the whole work. = 50 days Let total work = 200 units (LCM of 50and 40) Efficiency of ‘A’ = 200/40 = 5 units/day Efficiency of ‘B’ = 200/50 = 4 units/day required time taken = (.75×200)/ (5+4) =150/9=16.66days
Find the area of triangle formed by the points A(1, 2), B(4, 6), and C(5, 2).
Find the greatest 3-digit number which when divided by 11 or 14 leaves a remainder of 3.
The average height of a basketball team consisting of 18 players is 185 cm. If the height of the coach and the assistant coach is...
What will come in place of the question mark (?) in the following series?
120, 128, 144, 168, 240
If sin x + sin 2x = 1 and cos x + cos 2x = 0, find x.
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...
In a 1000 metres race, 'P' beats 'Q' by 150 metres, while 'Q' beats 'R' by 100 metres. Find the distance by which 'P' beats 'R' i...
Which technology is used in SSDs for storing data?
If (a + b) = 8 and ab = 10, then find the value of (a2 + b2).
What is the least number of square tiles required to pave the floor of a room 11 m 47 cm long and 6 m 82 cm broad?
Relevant for Exams:
