Question

11. It takes Mr. John 90 seconds to walk up an escalator when it is not moving. It takes Mr. John
60 seconds to go up, just standing when the same escalator is moving. How many seconds does it
take Mr. John to walk up the moving escalator?
1)1775
2]45
3]50
4]36​

Answer 1

Answer:

i think its 45 or 50 so im not sure (please follow)