15 stamps of equal value cost RS 18 how many stamps of the same value can be brought for - Maths - Direct and Inverse Proportions

Question

15 stamps of equal value cost RS 18 how many stamps of the same
value can be brought for RS36

Chicken Biryani · Accepted Answer

x1=18
y1=15
x2=36
y2=?
18/15=36/y2
y2=36*15/18=30
answer is 30

15 stamps of equal value cost RS 18. how many stamps of the same value can be brought for RS36.