20% of an hour is
20 minutes
12 minutes
33 1/3 minutes
B.
12 minutes
In a ratio, the quantities are:
always in the same unit
always in different unit
sometimes in the same unit and sometimes in different units
Total cost price is given by
CP + Overhead expenses
SP + Overhead expenses
CP - Overhead expenses
Rs 10 increased by 10% is
Re 1
Rs 9
Rs 11
The ratio of 5 m to 10 km is
1 : 20
1 : 2
2 : 1