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Thursday, October 20, 2016
Primary maths
A boy is using a flight of stairs. He walks some steps and runs 6 steps for 65s. Then he does it again by walking some steps and running 14 steps for 41s. How long will he take to walk up the flight of stairs.
Time taken to run 1 step = (65-41) / (14-6) = 3 sec Time taken to walk the steps = 65 + (6 * 3) = 83sec or Time taken to walk the steps = 41 + (14 *3) = 83sec
Solution:
ReplyDeleteTime taken to run 1 step = (65-41) / (14-6) = 3 sec
Time taken to walk the steps = 65 + (6 * 3) = 83sec
or
Time taken to walk the steps = 41 + (14 *3) = 83sec