mr tan ran from his home to a provision shop 400m away at an average speed of 2m/s. he walked back to his home at an average speed of 1m/s. find his average speed for the whole journey if
a) he did not stay in the shop
b) he stayed in the shop for 5 minutes
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average speed of 2m/s. he walked back to his home at an average speed of 1m/s. find his average speed for the whole journey if
a) he did not stay in the shop
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