The simple interest on a certain sum for 3 years at 10% per annum is 829.50. Find the wam
4
At what rate per cent per annum simple interest will a sum treble itself in 16 years!
(Hint. Let the sum be? Then, amount = 34. S.L. = ? (23 - 2) = ? 22.
16. A sum when reckoned at 6% per annum simple interest amounts to 4130 in 3 years. Find the
11. A sum of money put at 11% per annum simple interest amounts to ? 10370 in 2 years. What will
it amount to in 3 years at the same rate?
12. A sum of money put at 9% per annum simple interest amounts to ? 10160 in 3 years. What will
it amount to in 2 years at 8% per annum?
EXERCISE 11B
MULTIPLE CHOICE QUESTIONS
Choose the correct option in each of the following:
1. Which of the following statements is incorrect?
Hint. Let the eum betx. Then, S.I.
What sum will yield an interest of 7840 in 2 years at 6 --% per annum?
Answers
4 3length and of width cm along the other three sides. Find the measurements of the
5 paper left for him to write on.
1
Step-by-step explanation:
We first need to decide where we want the 1 and 1/4 to come off of.
Here we will prove that it is on the 12cm side
the 5 & 12 measurements will have 2 values reduced from them.
One side will have double 3/5's removed and the other will have one 3/5 and the 1_1/4.
The 12 side: 12 - 3/5 - 1_1/4 we turn them all into fractions/improper fractions
(common denominator of 5 and 4 is... 20..... and 1_1/4 = 5/4)
240/20 - 12/20 - 25/20 = (240-12-25) / 20 = 203 / 20
203 / 20 = 10_3/20
The 5 side: will have double 3/5's removed
5 - 3/5 - 3/5 ..... ( the common denominator will be 5)
25/5 - 3/5 -
Answer:
Step-by-step explanation:
3.. let the sum = principal =P
time =T= 3 yrs
rate of interest = R= 10%
simple interest =I= 829.50
I = PTR/100
P = (100*I)/(TR)
P =(100*829.50)/(3*10)
=82950/30
=Rs2765
Principal = P = Rs 2765
4.. given
sum =p
therefore simple interest=3p
T=16percent
let rate =R percent
s =P*R*T/100
so p will be cancelled in all
next step will be
3*=R*16/100
3*100=16R
therefore R= 3*100/16
75/4 percent
=18.75 percent
16..Let us calculate the total amount for Rs.100
3 years intrest for Rs.100 = pnr/100 = 100×3×6/100 = Rs. 18
Total amount for Rs.100 = Rs. 100 + Rs. 18 = Rs. 118
If total amount is Rs.118, then pricipal amount 100
For total amount 4130, principal amount = (4130/118)×100 = Rs. 3500
11..amount =11,305
A=P(1+RT/100)
10,370=P(1+11*2/100)
P=8500
S.I =PNR/100
S.I=8500*3*11/100
S.I=2805
A=P+S.I
A=8500+2805=11305
12..Find the interest percentage earned in 3 years:
1 year = 9%
3 years = 9 x 3 = 27%
Find the principal amount:
Interest = 27%
Percentage of money with interest = 100 + 27 = 127%
Sum of money with interest = Rs 10160
127% = rs 10160
1% = 10160 ÷ 127 = Rs 80
100 = Rs 80 x 100 = Rs 8000
Find the interest for 2 years at 8% per annum:
1 year = 8% x 8000 = 0.08 x 8000 = Rs 640
2 years = 640 x 2 = Rs 1280
Find the amount after 2 years:
Total amount = Rs 1280 + Rs8000 = Rs 9280
plMULTIPLE CHOICE QUESTIONS
Choose the correct option in each of the following:
1. Which of the following statements is incorrect?
Hint. Let the eum betx. Then, S.I.
What sum will yield an interest of 7840 in 2 years at 6 --% per annum?
Answer:
Step-by-step explanation:
3.. let the sum = principal =P
time =T= 3 yrs
rate of interest = R= 10%
simple interest =I= 829.50
I = PTR/100
P = (100*I)/(TR)
P =(100*829.50)/(3*10)
=82950/30
=Rs2765
Principal = P = Rs 2765
4.. given
sum =p
therefore simple interest=3p
T=16percent
let rate =R percent
s =P*R*T/100
so p will be cancelled in all
next step will be
3*=R*16/100
3*100=16R
therefore R= 3*100/16
75/4 percent
=18.75 percent
16..Let us calculate the total amount for Rs.100
3 years intrest for Rs.100 = pnr/100 = 100×3×6/100 = Rs. 18
Total amount for Rs.100 = Rs. 100 + Rs. 18 = Rs. 118
If total amount is Rs.118, then pricipal amount 100
For total amount 4130, principal amount = (4130/118)×100 = Rs. 3500
11..amount =11,305
A=P(1+RT/100)
10,370=P(1+11*2/100)
P=8500
S.I =PNR/100
S.I=8500*3*11/100
S.I=2805
A=P+S.I
A=8500+2805=11305
12..Find the interest percentage earned in 3 years:
1 year = 9%
3 years = 9 x 3 = 27%
Find the principal amount:
Interest = 27%
Percentage of money with interest = 100 + 27 = 127%
Sum of money with interest = Rs 10160
127% = rs 10160
1% = 10160 ÷ 127 = Rs 80
100 = Rs 80 x 100 = Rs 8000
Find the interest for 2 years at 8% per annum:
1 year = 8% x 8000 = 0.08 x 8000 = Rs 640
2 years = 640 x 2 = Rs 1280
Find the amount after 2 years:
Total amount = Rs 1280 + Rs8000 = Rs 9280
pls mark me as brainlist