Hi, Let us see the approach ... What is the distance ran by X before meeting Y at the mid point ? 6 + 3 = 9 km What is the distance ran by Y before meeting X at the mid point ? 6 + 3 = 9 km Time taken by X for running 9km = Time taken by Y for running 9km + 0.5 hours If a km / h is the speed of X, ...

time speed dist

X and Y run between point A and point B which are 6 km apart. X starts at 10 a.m. from A, reaches B, and returns to A. Y starts at 10:30 a.m. from B, reaches A, and comes back to B. Their speeds are constant with Y's speed being twice that of X. While returning to their starting points they meet at ...

averages

The average marks in a test in a class of 15 students was 74. If we take out two highest scores, the average goes down by 4. Find out the highest score in the classs( Total marks 100)?
A)100
B)86
C)94
D)90
E)70

OA:A

ratio proportion

A milkman takes one part of a milk water mixture of 80% concentration and three parts of a milk water mixture of 40% concentration and takes 60litres of the new mixture. How much water should evapourate from 60 litres of the mixture to make it of 60% concentration? A) 25 B) 10 C) 20 D) 15 E) 35 OA: ...

SC-help

1) In 1900, the Society of World Religions launched its effort to create the most comprehensive anthology on World religions.; although the project would take more than 60 years to complete, the compilation, the World Religious Order had been born A. would take more than 60 years to complete, the co...

Hi, I have a slightly different approach - Now lets call the couples 'a' 'a1' and 'b' 'b1' and the single person as 'c' The position of 'c' will determine the permutations 1) If 'c' occupies the first seat: C _ _ _ _ The second seat can be filled in 4 ways (a, a1, b, b1) The third seat can bee fille...

co-ordinate geometry

A and B are two points on a coordinate plane. All the points , in the same plane as A and B , whose distance from B is twice that from A lie on A) straight line intersecting AB at a point O such that 2AO = BO. B) a circle with center at a point O on AB such that AO = 2BO. C) a circle with center at ...

To solve, you need to factor out 4^41. What's left inside is small enough that it can be calculated in under 90 seconds: 4^41 (1 + 4 + 4^2 + 4^3 + 4^4) 4^41 (1 + 4 + 16 + 64 + 256) 4^41 (341) 4^41 (11) (31) * This number is divisible by 11 and 31 since these appear among its factors. This is why th...