two pipes a and b can fill a tank in 2 and 6 minutes respectively . if both the pipes are used together , then how long will it take to fill the tank ?
"part filled by the first pipe in 1 minute = 1 / 2 part filled by the second pipe in 1 minute = 1 / 6 net part filled by pipe a and pipe b in 1 minute = ( 1 / 2 ) + ( 1 / 6 ) = 2 / 3 i . e , pipe a and b together can fill the tank in 3 / 2 minutes = 1.5 minutes answer is c"
add(multiply(2, const_100), multiply(multiply(subtract(const_1, multiply(add(divide(const_1, 2), divide(const_1, 6)), const_2)), 2), const_60))