can anyone help me solve this question
A train covers a certain distance at a speed of 60 kmph. however if it were to halt for a fixed interval of time in each hour its av. speed reduces to 50 kmph . what is the time interval for which the train halts?
A square is divided into 108 identical rectangles. The ratio of length to breadth of the rectangle is 3:4. If the diagonal of the rectangle measures 1 cm, then the length of the diagonal of the square is closest to? Options 9,10,11,12
Someone help me with this one.
Find no.of integer points lying inside a region bounded by curve x^2+y^2=81?Approach guys.
Please tell the difference between the two questions. Also tell the answers and the approach.
1. In how many ways can 3 different rings be worn in 5 fingers of a hand (each finger can hold any number of rings) ?
2. In how many ways can 3 different balls be distributed into 5 different boxes ( each box can hold any number of balls) ?
ABC is an equilateral triangle inscribed in a circle of radius "r".What is the area of largest square that can be inscribed inside it?
The sides of a triangle are 7 cm, 18 cm and x cm long, where 'x' is an integer. How many such obtuse angled triangles are possible?
My answer is coming as 13 but actual answer is 10
My sol:
Case 1: x is longest side, then x>18-7 i.e. x>11
Case 2: x is not longest, then 18>x-7
Solving both will get 13 values
What am I missing
In a triangle PQR, points X,Y,Z are on PQ, PR and QR such that PX=XQ. RY/YP = a/b. QZ/ZR=3. also, (area PXY)^2 = (area QXZ) * (area RYZ). The ratio a:b is ?
If, X= -16 or X= -8
Y= -16 or Y= -5
then what should be the relationship between X and Y?
A) X>Y
B) X less than Y
C) X>/=Y
D) X less than or equal to Y
E) = OR No relationship can be established
Ajay tore away one of the pages of his book. Later, Anil figured that the average of the page numbers of the remaining pages is 1283/19. Find the page numbers of the pages that Ajay tore away. (Assume that the pages are numbered starting from 1.)
Solution/Approach pls
In a trapezium ABCD, AB II DC & AB=2CD, If the diagonal intersect at 0. What is the ratio of area of triangle(AOB/COD)?
is someone having questions on remainders, if yes please do mail me up. i am done with all concepts. or suggest a good source to practice
a real number k is chosen between 0 and 10? what is probability hat k^2> 36?
x+4y=xy Find no. of integral soln ? I'm getting 5.
OLIVE BOARD TEST SERIES COUPON CODE??
there are 10 marbles in a bag, 9 blue and one red, martha and rose take turns picking one marble ( with replacement) until one of them picks the red marble.
martha picks first. what is probability that rose will get the red marble?
N is a natural number of at least 5 digits and its leftmost digit is 6. When this 6 is removed from N, the number thus obtained is found to be times of N. What is the sum of the digits of N?
What is the remainder when 382382.... Up to 300 digits is divided by 101?
an engineer undertakes a project to build a road 15km long in 300days and employs 45 men for the purpose. After 100 days he finds only 2.5km of the road has been completed. Find the aprox number of extra men he must employ to finish the work in time.
How many terms are there in the expression (1 + x^2 + x^4)^10 when it is expanded?
There are 20 students in a class studying 3 different subject - maths, biology, chemistry. None of the student takes up a single subject alone. If each of these subjects is taken up by a different number if students, what can be the maximum number of students taking up all the there three subjects? A 20, B 14, C 16, D 17