Question

A hospital use 15litre400ml of liquid cleaner every month,find the quantity of liquid cleaner in ml

Answer 1

15 l 400ml =15.400
Conversion of l to ml =l*1000
=15.400*100=15400
When you convert big unit to a smaller unit multiply
When you convert small to big unit divide
A mnemonic to learn this is
BSD. (Big to small divide)
SBM. (Small to big multiply