EASY
Take Sarita's age to be x years.
(a) What will be her age 5 years from now?
(b) What will be her age 3 years back?
Sarita's age = x
(a) x+5
(b) x-3
15/18= /6=10/ = /30
15/18=5/6=10/12=25/30
40 persons:200 persons :: Rupees 15:Rupees 75
40/200=1/5=1:5
15/75=1/5=1:5
40/200 :: 15:75 are in proportion
True
There are 20 girls and 15 boys in a class
(a) What is the ratio of girls to the number of boys?
Total no. of girls=20
Total no. of boys=15
Therefore, Ratio of girls to the no. of boys
=20/15=4/3=4:3
30 minutes to 1.5 hours
1.5 hours=90 minutes
30/90=3/9=1/3=1:3
7.5 litres:15 litres::5 kg:10kg
15/7.5=15/7.5x10=75=1/5=1:5
5/10=1/5=1:5