As you see this is the mold which causes severe health problems infact one of the most dangerous mold is that Toxic black mold which cause respiratory, nasuea and other problems like skin etc. Also it causes cancer as well.
40 km = 24.8548 mi. There are 1.609344 kilometres in a mile. Therefore, rounded to two decimal places, 40 kilometres is equal to 40/1.609344 = 24.85 miles.
1 mile = 1.609 km. Set up the conversion so the desired unit will be canceled out. In this case, we want kilometers to be the remaining unit. distance in km = (distance in mi) x (1.609 km/1 mi) distance in km = (2445) x (1.609 km/1 mi) distance in km = 3934 km.