India’s No.1 Educational Platform For UPSC,PSC And All Competitive Exam

Download Our App

A sum of money at simple interest amounts to Rs. 815 in 3 years and to Rs. 854 in 4 years. The sum is

1Rs. 650
2Rs. 690
3Rs. 698
4Rs. 700

Answer:- 1

Explanation:-

Solution:

\begin{aligned} S .I . for1year \\ = Rs . (854 - 815) \\ = Rs .39 \\ S .I . for 3 years \\ = Rs . (39 \times 3) \\ = Rs . 117 \\ ∴ P r i n c i p a l \\ = Rs . (854 - 117) \\ = Rs . 698 \end{aligned}

$\eqalign{ & {\text{S}}{\text{.I}}{\text{. for1year}} \cr & = {\text{Rs}}.\left( {854 - 815} \right) \cr & = {\text{Rs}}.39 \cr & {\text{S}}{\text{.I}}{\text{. for 3 years}} \cr & = {\text{Rs}}{\text{.}}\left( {39 \times 3} \right) \cr & = {\text{Rs}}{\text{. }}117 \cr & \therefore Principal \cr & = {\text{Rs}}{\text{.}}\left( {854 - 117} \right) \cr & = {\text{Rs}}{\text{. }}698 \cr}$

Workspace Report

Post your Comments

", "dateCreated": "7/24/2019 10:09:12 AM", "author": { "@type": "Person", "name": "Nitin Sir" } }, "suggestedAnswer": { "@type": "Answer", "text": "

Solution:

\begin{aligned} S .I . for1year \\ = Rs . (854 - 815) \\ = Rs .39 \\ S .I . for 3 years \\ = Rs . (39 \times 3) \\ = Rs . 117 \\ ∴ P r i n c i p a l \\ = Rs . (854 - 117) \\ = Rs . 698 \end{aligned}

$\eqalign{ & {\text{S}}{\text{.I}}{\text{. for1year}} \cr & = {\text{Rs}}.\left( {854 - 815} \right) \cr & = {\text{Rs}}.39 \cr & {\text{S}}{\text{.I}}{\text{. for 3 years}} \cr & = {\text{Rs}}{\text{.}}\left( {39 \times 3} \right) \cr & = {\text{Rs}}{\text{. }}117 \cr & \therefore Principal \cr & = {\text{Rs}}{\text{.}}\left( {854 - 117} \right) \cr & = {\text{Rs}}{\text{. }}698 \cr}$ ", "dateCreated": "7/24/2019 10:09:12 AM" } }

Test

Classes

E-Book