Question 762810
I just try to use logic at each step
It takes 2,700 ants 4 hrs to carry 2 jam sandwiches 37 m.
3 times as many ants can carry the same number of 
jam sandwiches the same distance in 1/3 of that time.
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8,100 ants take 4/3 hrs to carry 2 jam sandwiches 37 m.
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The same number of ants wiil take 3 times longer to
carry 3 times as many js's  the same distance, so
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8,100 ants take 4 hrs to carry 6 js's 37 m.
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The same number of ants wiil take 16 times longer to
carry the same number of js's {{{ 37*16 = 592 }}} m.
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8,100 ants take 64 hrs to carry 6 js's 592 m
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The same number of ants will take 1/37 of that time
to carry the same number of js's 1/37 of that distance
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8,100 ants take 64/37 hrs to carry 6 js's 16 m.
This is 1 hr 43 min 47 sec approx.