A man spends 42% of his salary on food and 12% on transport. if the amount he spent on food is Rs 16800, how much was his transport cost?

The man's transport cost is Rs 4800

Step-by-step explanation:

42% of x = 16800

42/100 × x = 16800

42x = 1,680,000

x = 1,680,000/42 = Rs 40,000

∴ Salary is Rs 40,000

12% of 40000 = 12/100 × 40000 = Rs 4800

the balance is found at the link

step-by-step explanation:

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.