8/17/2019 Math - Simple Interest, Linear Equations
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Simple Interest and Linear Equations
1. A sum of money at simple interest amounts to Rs. 815 in 3
years and to Rs.854 in 4 years. The sum is_______________
2. The perimeter of a rectangle is 34 units. Its width is 6.5
units.Write an equation and thus determine the length 'l', of the
rectangle
3. Tom invested an amount of Rs. 13,900 divided in two different
schemes A andB at the simple interest rate of 14% p.a. and 11% p.a.
respectively. If the totalamount of simple interest earned in 2
years be Rs. 3508, what was the amountinvested in Scheme B?
4. An automobile financier claims to be lending money at simple
interest, but heincludes the interest every six months for
calculating the principal. If he ischarging an interest of 10%, the
effective rate of interest is ______________
5. The admission fee at a small fair is $1.50 for children and
$4.00 for adults. Ona certain day, 2200 people enter the fair and
$5050 is collected. How manychildren and how many adults
attended?
6. Kyle borrowed $ 3400 at the rate of 8% p.a. for 225 days.
Find the interest andamount she paid.
7. A lent Rs. 5000 to B for 2 years and Rs. 3000 to C for 4
years on simpleinterest at the same rate of interest and received
Rs. 2200 in all from both ofthem as interest. The rate of interest
per annum is:
8. The sum of the digits of a two-digit number is 7. When the
digits are reversed,the number is increased by 27. Find the
number.
9. What will be the ratio of simple interest earned by certain
amount at the samerate of interest for 6 years and that for 9
years?
10.A number is multiplied by 5, the result is addded to 7, then
divided by 10, thensquared, 14 is added, then finally divided by 2
and the final result is 8.445.What's the number?
