6. On one job, two power shovels excavate 20000 m3 of earth the larger the shovel working for 40 hours and the smaller s3hovel for 35 hours Another job they removed 40000 m 3with the larger shovel working for 70 hours and the smaller working 90 hours. How much earth can the larger shaovel move in one hour? A.347.33m B..328834m 0.269.47m D. NOTG 7. Pedro can paint a fence 50% faster than Juan and 20% faster than Pilar and together they can paint a given fence in 4 hours. How long will it take Pedro to paint the same fence if he had to work alone? A. 8 hrs B. 10 hrs 0. 11 hrs D. 12 hrs 8. The sum of ages of 5 children born at the intervals of 3 years each is 50 years. What is the age of the youngest child? A. 2 B. 3 C. 4 D. 5 9. The difference between a two-digit number and the number obtained by interchanging the digits is 36. What 7 L is the difference between the sum and the difference of the digits of the number if the ratio between the digits of the number is 1: 2? A. 4 B. 6 C. 8 D. 10 10. In a flight of 600 km, an aircraft was slowed down due to bad weather. Its average speed for the trip was reduced by 200 km/hr and the time of flight increased by 30 minutes. The duration of the flight is: A. 0.5 hr B. 1 hr C. 2.5 hrs D. 3 hrs