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Revision – 19 May 2017- Military School
Average
1. (a) How to find the average when total of
7 quantities are given?
(b) The average age of 50 students and a teacher
is 25 years. When the teacher’s age is excluded, the average age decreases by 1
year. What is the age of the teacher?
c) Average of the runs
made by Raju, Shyam and Hari is 7 less than that made by Shyam, Hari and
Kishore. If Kishore’s score is 35, what is Raju’s score?
Simple Interest
2.(a) What is the formula
to find the Rate of Interest , if SI, P
and Time is given?
(b) At time will a
Simple interest double itself at the rate of 10% SI per annum? Let P be Rs.1000?
c) A sum of money becomes 3 times in 5 years. In how many
years will the same sum become 6 times at the same rate of simple
interest?
Age Related Problems
3. a) The
present age of Ravi’s father is four times Ravi’s present age. Five years back
he was seven times as old as Ravi was at that time. What is the present age of
Ravi’s father?
b) Geeta is 4 years older than Seema. After 10 years the sum of their
ages will be 48 years. Find the age of Seema.
4. a) A and B
started a business by investing Rs.3,50,000 and Rs.1,40,000. A gets 20% of the
yearly profit for managing the business. Thereafter the profit is divided in
the ratio of the capital. If A receives totally Rs.38,000 more than B at the
end of a year, then the profit is
b) A profit of Rs.33, 630 earned during
an year is divided among A, B and C. The profit sharing ratio of A and B is 3 :
7 and that of B and C is 6 : 5. The amount of money received by B is:
Time and Distance
a) Raghav had
to walk a certain distance. He walked half the distance at a speed of 4 km/hour
and the remaining half at a speed of 5 km/hour. If the total time taken was 9
hour, the distance was
b) A man
travelled a distance of 80 km in 7 hrs partly on foot at the rate of 8 km per
hour and partly on bicycle at 16 km per hour. The distance travelled on the
foot is
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Answers
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1
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(a) Total / Qty = Les Total be x / qty is 7= x / 7
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(b) Age of teacher is 75 Years
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c) 14 Years
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2
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R = (SI x 100 ) / P x T
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b) 10 Years
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c) 7. 5 Years
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3
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a) 40 years
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b) 12 Years
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4
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a) Rs.70,000
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b) B’s share = Rs. 14,868
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5
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a) Therefore total distance = d x 2 = 40 kms
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b) 32 km
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