speed of a boat in standing water is 10 kmph and speed of the stream is 2 kmph . a man can rows to a place at a distance of 100 km and comes back to the starting point . the total time taken by him is ?
speed upstream = 8 kmph speed downstream = 12 kmph total time taken = 100 / 8 + 100 / 12 = 20 hours 50 min answer is c
add(multiply(add(add(10, 2), subtract(10, 2)), 100), multiply(subtract(add(divide(100, add(10, 2)), divide(100, subtract(10, 2))), add(add(10, 2), subtract(10, 2))), const_60))