Bachhu Manjhi earns Rs 24000 in 8 months. At this rate,

a) how much does he earn in one year?

b) in how many months does he earn Rs 42000?

Earning of Bachhu Manjhi in 8 months = Rs. 24,000

Earning of Bachhu Manjhi in 1 months = = Rs. 3,000

a) Earning of Bachhu Manjhi in one year = 3000× 12 = Rs. 36,000 (∵ 1 year = 12 months)

b) Let after ‘x’ months he will earn 42,000

Earning of Bachhu Manjhi in x months = 3000x

3000x=42000

Hence, after 14 months Bachhu Manjhi will earn 42,000