a cash prize of * 2,000 to all the students securing grade 'A2'. If the total prize money whi
distributed is * 1,00,000 and there are 12 students getting the grade 'A1', find the number of stu
getting the grade 'A2'.
21. Sharmila has a total of 3 590 as currency notes in the denominations of 3 50,3 20 and 3 10. The
the number of 50-rupee notes and 20-rupee notes is 3 : 5. If she has a total of 25 notes, how man
of each denomination does she have?
2. The digits of a two-digit number differ by 3. If the digits are interchanged and the resulting nu
added to the original number, we get 143. What is the original number?
3. The cost of fencing a rectangular plot at the rate of 7 55 per meter is 6,160. If the length
breadth of the rectangular field are in the ratio 3:5, find its area.
1. Half a herd of deer are grazing in the field and three-fourth of the remaining are playing nearby.
nine are drinking water from the pond. Find the number of deer in the herd.
5. If Sushant rides his bicycle at the speed of 2 km/hr, he reaches his school late by 1 minute. Oni
the speed by 2 km/hr, he reaches 5 minutes early. Find the distance between his school and his
Brain Stimulants
2x+1
2x-1
3x - 1
1+X
2.
- 2x -
= 0
-3x -
+ 2 = 0
3
4
2
2
4
B
Two cars start together from city A and B, respectively and move towards each other. The average
car is 5 km/hr more than the other and after travelling for 5 hrs the two cars are 85 km apart. 1
between the two cities is 510 km, find their speeds.
smati rise worth
11
Answers
Answer:
Let the award money given for honesty, Regulation and Hard work be
Rsx,Rsy and Rsz, respectively,
Since, total cash reward is Rs.6000 Therefore,
x+y+z=6000...........(1)
3 times the award money for hard work added to gives for Honesty amounts to Rs.11,000 Therefore,
x+3z=11000............(2)
Award money for Honesty and Hardwork together is double the one given for regularity. Therefore.
x+z=2y
x−2y+z=0.............(3)
The above system of equation can be written in matrix for
AX=B
Evaluating ∣A∣
∣A∣=1(0+6)−1(1−3)+1(−2−0)
=6+2−2=
6
Now, calculate the Adjoint (A)
=−1
Therefore, Adjoint A=
x=Rs,500,y=Rs,2000,z=Rs,3500
LEADERSHIP is another value to be considered for award
Step-by-step explanation:
i hope it is help full for you