Time and Work - Single MCQs (Page 9)

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Q81. A man can row 6 kmph in still water. When the river is running at 1.2 kmph, it t...Q82. A man can row 6 kmph in still water. When the river is running at 1.2 kmph, it t...Q83. A man swims downstream 72 km and upstream 45 km taking 9 hours each time; what i...Q84. A man swims downstream 30 km and upstream 18 km taking 3 hours each time, what i...Q85. A boat can move upstream at 25 kmph and downstream at 35 kmph, then the speed of...Q86. A man can row upstream at 25 kmph and downstream at 35 kmph, and then find the s...Q87. A man can row with a speed of 15 kmph in still water. If the stream flows at 5 k...Q88. A boat goes 100 km downstream in 10 hours, and 75 m upstream in 15 hours. The sp...Q89. A person can swim in still water at 4 km/h. If the speed of water 2 km/h, how ma...Q90. Two pipes X and Y can separately fill a cistern in 18 and 24 hours respectively....