Question

solved question number 11

Answer 1

answer is 50
because 20 % is 10 rupee
and then 10 % will be 5 rupee
then cost of product will be 50

Answer 2

if the cost of lamp is x rupees.
so,
$x \times 20\% = 10$

$so \: x = 10 \times 100 \div 20$
$so \: x = 50$
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