R s aggarwal mathematics class 7 Solutions for Chapter 9 unitary method

Exercises in Chapter 9 unitary method Grade 7

Unitary Method Exercise 9A

Unitary Method Exercise 9B

Unitary Method Exercise 9C

Questions in Unitary Method Exercise 9A

If 15 oranges cost ₹110, what do 39 oranges cost?

If 8 kg sugar costs ₹ 260, how much sugar can be bought for ₹877.50?

The cost of 37m of silk is ₹6290. What length of this silk can be purchased for ₹4420?

A worker is paid ₹ 1110 for 6 days. If his total wages during a month are ₹4625, for how many days

did he work?

A car can cover a distance of 357km on 42 liters of petrol. How far can it travel on 12 liters of petrol?

Traveling 900 km by rail costs ₹ 2520. What would be the fare for a journey of 360 km when

a person travels by the same class?

A train covers a distance of 51 km in 45 minutes. How long will it take to cover 221 km?

Questions in Unitary Method Exercise 9B

If 48 men can dig a trench in 14 days, how long will 28 men take to dig a similar trench?

16 men can reap a field in 30 days. How many men must be engaged to reap the same field in 24

days?

45 cows can graze a field in 13 days. How many cows will graze the same field in 9 days?

16 horses can consume a certain quantity of corn in 25 days. In how many days would the same

quantity be consumed by 40 horses?

A girl can finish a book in 25 days if she reads 18 pages of it every day. How many days will she take

to finish it, if she reads 15 pages every day?

Reeta types 40 words per minute and takes 24 minutes to type a certain document. Her friend Geeta

has a typing speed of 48 words per minute. In how much time, will she be able to type the same

document?

Questions in Unitary Method Exercise 9C

If 4.5 m of a uniform rod weighs 17.1 kg, what is the weight of 12 m of such a rod?

(a)51.2 kg (b)53 kg (c)45.6 kg (d)56 kg

In a map, 0.8 cm represents 8.8 km. How much distance will be represented by 80.5 cm?

(a)805 km (b)855.5 km (c)644 km (d)none of these

In a race, Raghu covers 5 km in 20 minutes, how much distance will he cover in 50 minutes?

(a)10.5 km (b)12 km (c)12.5 km (d)13.5

A garrison of 500 men had provisions for 24 days. However, a reinforcement of 300 men arrived.

The food will now last for

(a)18 days (b)17(1/2) days (c)16 days (d)15 days

If (4/5) of a cistern is filled in 1 minute, how much more time will be required to fill the rest of it?

(a)20 seconds (b)15 seconds (c)12 seconds (d)10 seconds

If 21 cows eat as much as 15 buffaloes, how many cows will eat as much as 35 buffaloes?

(a)49 (b)56 (c)45 (d) none of these

A tree, 6 m tall, casts a 4-m-long shadow. At the same time, a flag pole casts a 50-m-long shadow.

How long is the flag pole?

(a)50 m (b)75 m (c)33(1/3) m (d)None of these

8 men can finish a piece of work in 40 days. If 2 more men join them, the work will be completed in

(a)30 days (b)32 days (c)36 days (d)25 days

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Chapters in this book

Integers

Fractions

Decimals

Rational Numbers

Exponents

Algebraic Expressions

Linear Equations in one variable

Ratio and Proportion

Unitary Method

Percentage

Profit and Loss

Simple Interest

Lines and Angles

Properties of Parallel Line

Properties of Triangles

Congruence

Constructions

Reflection and Rotational Symmetry

Three-Dimensional Shapes

Mensuration

Collection and Organisation of Data (Mean, Median, Mode)

Bar Graphs

Probability