Page 122 - NUMINO Challenge_C2
P. 122
3 When a train traveling 350 m in 1 minute passes through a 1.5-km long
tunnel, the train cannot be seen for 3 minutes. How long is the train?
4 Julie’s house and Sam’s house are 2 km apart. They decided to meet in
the middle and lef t their houses at the same time. Julie walked 50 m in
1 minute and Sam walked 30 m in 1 minute. Julie’s dog ran towards
Sam at a speed of 100 m per minute and when the dog got to Sam, it
turned around and ran towards Julie. If Julie’s dog repeated this
process until Julie and Sam met, how far did the dog run?
119Communication
tunnel, the train cannot be seen for 3 minutes. How long is the train?
4 Julie’s house and Sam’s house are 2 km apart. They decided to meet in
the middle and lef t their houses at the same time. Julie walked 50 m in
1 minute and Sam walked 30 m in 1 minute. Julie’s dog ran towards
Sam at a speed of 100 m per minute and when the dog got to Sam, it
turned around and ran towards Julie. If Julie’s dog repeated this
process until Julie and Sam met, how far did the dog run?
119Communication
