Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 10 Answered

The si on a certain sum at a certain rate in 3 year is 78 and the ci in 2 year is 53 .find the rate.
Asked by beheraswagatika001 | 05 Mar, 2019, 05:53: AM
Expert Answer
Let p is principle and r is rate of interest
 
Simple interest : (p×3×r)/100 = 78    or    p×r = 2600 ...................(1)
 
Compound Interest : begin mathsize 12px style p open parentheses 1 plus r over 100 close parentheses squared space equals space p plus space 53 end style
begin mathsize 12px style p space plus space fraction numerator p r squared over denominator 10000 end fraction plus fraction numerator p r over denominator 50 end fraction space equals space p space plus 53 space space................... left parenthesis 2 right parenthesis s u b s t i t u t i n g space space p r space equals space 2600 space a s space g i v e n space i n space e q n. left parenthesis 1 right parenthesis space comma space space e q n. space left parenthesis 2 right parenthesis space space i s space w r i t t e n space a s fraction numerator 2600 cross times r over denominator 10000 end fraction space plus space 2600 over 50 space equals space 53 space space space space space space o r space fraction numerator 26 space r over denominator 100 end fraction space equals space 1 space space space space space o r space space space r space equals space 100 over 26 space almost equal to space 4 end style
Answered by Thiyagarajan K | 05 Mar, 2019, 09:37: AM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test Subjective Questions Webinar Subjective Questions Pre Board Assessment
Answered Unanswered My Questions My Answers
CBSE 10 - Maths
co prime
Asked by bk3865728 | 22 Mar, 2023, 10:55: PM
ANSWERED BY EXPERT
CBSE 10 - Maths
The number of polynomials having zeroes -3 and 5 is A) only one B) infinite C) exactly two D) at most two
Asked by rashmij34 | 21 Mar, 2023, 05:01: PM
ANSWERED BY EXPERT
CBSE 10 - Maths
The 11th term from the end of the AP 10, 7, 4,........, -62 is  A) 25 B) 16 C) -32 D) 0
Asked by paresh0311 | 21 Mar, 2023, 04:58: PM
ANSWERED BY EXPERT
CBSE 10 - Maths
A golf ball is spherical with about 300 - 500 dimples that help increase its velocity while in play. Golf balls are traditionally white but available in colours also. In the given figure, a golf ball has diameter 4-2 cm and the surface has 315 dimples (hemi-spherical) of radius 2 mm. Based on the above, answer the following questions: (i) Find the surface area of one such dimple. (ii) Find the volume of the material dug out to make one dimple. Find the total surface area exposed to the surroundings.
Asked by swetalinasamantaray022 | 21 Mar, 2023, 04:16: PM
ANSWERED BY EXPERT
CBSE 10 - Maths
Two pillars are standing on either side of a 80 m wide road. Height of one pillar is 20 m more than the height of the other pillar. From a point on the road between the pillars, the angle of elevation of the higher pillar is 60°, whereas that of the other pillar is 30°. Find the position of the point between the pillars and the height of each pillar. (Use √3 = 1-73)
Asked by swetalinasamantaray022 | 21 Mar, 2023, 04:15: PM
ANSWERED BY EXPERT
CBSE 10 - Maths
If n(A) = 2, P(A) = 1/5 , then n(S) = ? (A) 10 (B) 5/2 (C) 2/5 D) 1/3
Asked by rashmij34 | 19 Mar, 2023, 12:30: AM
ANSWERED BY EXPERT
CBSE 10 - Maths
For an given A.P. a = 3.5, d = 0, then tn = . . . (A) 0 (B) 3.5 (C) 103.5 (D) 104.5
Asked by paresh0311 | 19 Mar, 2023, 12:26: AM
ANSWERED BY EXPERT
CBSE 10 - Maths
If radius of the base of cone is 7 cm and height is 24 cm, then find its slant height. (A) 23 cm  (B) 26 cm  (C) 31 cm  D) 25 cm
Asked by rashmij34 | 18 Mar, 2023, 11:03: PM
ANSWERED BY EXPERT
CBSE 10 - Maths
Chords AB and CD of a circle intersect inside the circle at point E. If AE = 4, EB = 10, CE = 8, find ED. (A) 7 (B) 5 (C) 8 (D) 9
Asked by paresh0311 | 18 Mar, 2023, 10:58: PM
ANSWERED BY EXPERT
CBSE 10 - Maths
find a quadratic polynomial whose zero are - 5 and - 7
Asked by rimrimsangma36 | 12 Mar, 2023, 04:57: AM
ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt