1.

Walking at the rate of 4 kmph a man covers certain distance in 2hrs 45 min . Running at a speed of 16.5 kmph the man will cover the same distance in how many minutes ?

Answer»

35 min.
40 min.
45 min.
50 min.

SOLUTION :When distance is constant , then speed is INVERSELY proportional
`S_(1) : S_(2)= T_(2) : T_(1)`
`4 : 16.5 = T_(2) : 165`
or `(4)/(16.5) = (T_(2))/(165)`
`T_(2) = (165 XX 4)/(16.5) = 40` min


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