Rahul went to a shop and bought things worth Rs. 25, out of which 42 Paise went on sales tax on taxable purchases. If the tax rate was 6%, then what was the cost of the tax free items?  Pick one.
A) 17.7 B) 19.7 C) 19.9 D) 21.7 E) 22.8
Total cost of the items he purchased = Rs.25   Given that out of this Rs.25, 42 Paise is given as tax   =&gt; Total tax incurred = 42 Paise = Rs.42/100   Let the cost of the tax free items = x   Given that tax rate = 6%   ∴ (25−30/100−x)6/100 = 42/100   ⇒ 6(25 −0.3 −x) = 42   ⇒ (25 − 0.3 − x) = 7   ⇒ x = 25 − 0.3 − 7 = 17.7   17.7)
<result>A</result>
Rahul went to a shop and bought things worth Rs. 25, out of which 42 Paise went on sales tax on taxable purchases. If the tax rate was 6%, then what was the cost of the tax free items?