Question
Peter can cover a certain distance in 1 hr. 24 min. by covering two-third of the distance at 4 kmph and the rest at 5 kmph. Find the total distance.
Answer: Option A
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Let the total distance be `x` km. Then,
`(2/3 x)/(4) + (1/3 x)/(5) = 7/5 hArr x/6 + x/15 = 7/5 hArr 7x = 42 hArr x` = 6.
`:.` Total distance = 6 km.
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