Question

the sugar is sold at rupees 5.4 per kg at a loss of 10% at what price should it be sold per kg to earn a profit of 20%

Answer 1

90% (which is 100%-10%, implying the loss) is = 5.4kg 
so 5.4kg/90% = 6kg* which is at 100% 
a 20% profit is found at 120%, thus 6kg x 120%** = 6×1.2=7.2kg

[Calculation:
*5.4×100/90=6 (6 kg)
**6×120/100]

Answer 2

Step-by-step explanation:

90% (which is 100%-10%, implying the loss) is = 5.4kg 

so 5.4kg/90% = 6kg* which is at 100% 

a 20% profit is found at 120%, thus 6kg x 120%** = 6×1.2=7.2kg

[Calculation:

*5.4×100/90=6 (6 kg)

**6×120/100]