18 men can eat 20 kg of rice in 3 days. How long will 6 men take to eat 40 kg of rice?

A. 20 B. 18 C. 32 D. 20

If 25 men can eat 150 kg of wheat in 30 days then 45 men can eat 450 kg of wheat in how many days?

A. 13 days B. 50 days C. 15 days D. 18 days