Question

Please solve this


Sisters and brothers leaving one person​

Answer 1

Answer:

Step-by-step explanation:

first 5680-5200=480

answer/(original price or principle amount )=480/5200

=0.092x100 = 9.2%

Answer 2

$\huge \sf {\orange{\underline{\purple{\underline{Question :-}}}}}$

A sum of money amounts to Rs. 5200 in 5 years and to Rs. 5680 in 7 years at simple interest. The rate of interest per annum is :

$\huge \sf {\orange {\underline {\pink{\underline{Answer :-}}}}}$

$\sf\leadsto{P + SI ~for~ 5 yrs. = 5200...(I)}$

$\sf\leadsto{P + SI ~for~ 7 yrs = 5680…(II)}$

$\sf\purple{On~ sub.~ ~equation (I)~ from~ (II)}$

$\sf\leadsto{SI ~for~ 2 years = 480}$

∴ SI for 1 years = 240

∴ From equation (I),

$\sf\mapsto{P + 5 }\times {240 = 5200}$

$\sf\mapsto{P= 5200-1200=4000}$

$\sf\mapsto{R\%= }\dfrac{SI×100}{T×P}$

$\sf\mapsto{R\%= }\dfrac{240×100}{1×4000}$

$\sf\red\mapsto\blue{6\%}$

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