646  Speed
1

Name : _________________

refresh

Two trains that are 450 km apart are heading towards each other at 80 km/h and 70 km/h. How many hours will it be before they meet?



Two trains that are 1280 km apart are heading towards each other at 70 km/h and 90 km/h. How many hours will it be before they meet?



Two trains that are 1200 km apart are heading towards each other at 90 km/h and 60 km/h. How many hours will it be before they meet?



Two trains that are 260 km apart are heading towards each other at 60 km/h and 70 km/h. How many hours will it be before they meet?



Two trains that are 1000 km apart are heading towards each other at 100 km/h and 100 km/h. How many hours will it be before they meet?

Two trains that are 220 km apart are heading towards each other at 50 km/h and 60 km/h. How many hours will it be before they meet?



Two trains that are 420 km apart are heading towards each other at 60 km/h and 80 km/h. How many hours will it be before they meet?



Two trains that are 1530 km apart are heading towards each other at 70 km/h and 100 km/h. How many hours will it be before they meet?



Two trains that are 960 km apart are heading towards each other at 80 km/h and 80 km/h. How many hours will it be before they meet?



Two trains that are 1620 km apart are heading towards each other at 100 km/h and 80 km/h. How many hours will it be before they meet?

+(         )

(         )+

++[[          ]]++