Question

Hair purchased a mobile phone for Rs 15120 inclusive of 12% GST.What is the original price of this mobile?

Answer 1

Original price = 15120 / 1.12 = 13500

Answer 2

$\textbf{\underline{\underline{According\:to\:the\:Question}}}$

GST = 12% (Given)

$\textbf{\underline{Price\;of\;mobile\;with\;GST}}$

= Rs. 15120

Assumption

$\textbf{\underline{Price\;of\;mobile\;without\;GST}}$

= Rs. 'p'

Situation :-

$\tt{\rightarrow p+\dfrac{p\times 12}{100}=15120}$

$\tt{\rightarrow\dfrac{p}{1}+\dfrac{12p}{100}=15120}$

$\tt{\rightarrow\dfrac{100p+12p}{100}=15120}$

$\tt{\rightarrow\dfrac{112p}{100}=15120}$

112p = 15120 × 100

112p = 1512000

$\tt{\rightarrow p=\dfrac{1512000}{112}}$

p = 13500

Hence we get,

Original price of the mobile phone = 13500