Exercise 11.1

(i)

(i) Number of blue coloured squares is ………………. times the number of red coloured squares.

Answer:

Red coloured squares =

Blue coloured squares =

So, blue coloured squares is 6/4 = times the number of red coloured squares.

(ii)

(ii) Number of red coloured squares is times the number of blue red coloured squares.

(iii)

(iii) Find the ratio of the number of blue squares to the number of red squares.

Answer:

: (or) : `

(i)

(i) A milkman adds 250 ml of water to 1 litre of milk. Find the ratio of water to milk.

Answer:

Quantity of water = ml

Quantity of milk = litre = ml (∵ 1 litre = 1000 ml)

Ratio of water to milk = : = :

(ii)

(ii) Satya’s mother bought 4 kg pulses and 50g chilli powder. Find the ratio of the weight of chilli powder to pulses. What is the ratio of the weight of pulses to chilli powder?

Answer:

Weight of pulses = kg = grams (∵ 1 kg = 1000 grams)

Weight of chilli powder = grams

Ratio of chilli powder to pulses = : = :

Ratio of pulses to chilli powder = : = :

(iii)

(iii) Rani takes 30 minutes to reach school from home. Ismail takes 12 an hour to cover the same distance. Find the ratio of time taken by Rani to the time taken by Ismail.

Answer:

Time taken by Rani = minutes

Time taken by Ismail = 12 hour = minutes (∵ 1 hour = 60 minutes)

Ratio of Rani’s time to Ismail’s time = : = :