The DAV Class 4 Maths Solutions and **DAV Class 4 Maths Chapter 7 Brain Teasers **Solutions of Capacity offer comprehensive answers to textbook questions.

## DAV Class 4 Maths Ch 7 Brain Teasers Solutions

Question 1.

Tick (✓) the correct answer.

(a) The unit to measure the length of a railway track is-

(i) metre

(ii) centimetre

(iii) kilometre

(iv) gram

Answer:

(iii) kilometre

(b) 3 m 3 cm = __________ cm

(i) 33

(ii) 303

(iii) 330

(iv) 3300

Answer:

(ii) 303

(c) For a family of three, rice needed for one meal is __________

(i) 4\(\frac{1}{2}\) kg

(ii) 1500 g

(iii) \(\frac{1}{4}\) kg

(iv) 1000 g

Answer:

(iii) \(\frac{1}{4}\) kg

(d) Which of following is not sold by measuring capacity?

(i) milk

(ii) petrol

(iii) apples

(iv) oil

Answer:

(iii) apples

(e) The smallest unit of weight is-

(i) milligram

(ii) gram

(iii) centimetre

(iv) millimetre

Answer:

(i) milligram

Question 2.

Which unit of measurement will you choose to express the following?

(a) length of a railway track

(b) Weight of an apple

(c) ink in a pen

(d) height of a 10-year old boy.

Answer:

(a) km

(b) gram

(c) ml

(d) cm, m

Question 3.

Fill in the blanks.

(a) 7 kg = __________g

(b) 10 m = __________cm

(c) 72 l = __________ml

(d) 2 kg 5 g __________g

(e) 3 m 3 cm = __________cm

(f) 9 l 352 ml = __________ ml

(g) 7050 ml = __________l __________ml

(h) 325 cm = __________m __________cm

(i) 1575 g = __________kg __________ g

(j) 7 km = __________m

Answer:

(a) 7000

(b) 1000

(c) 72000

(d) 2005

(e) 303

(f) 9352

(g) 7 l 50 ml

(h) 3 m 25 cm

(i) 1 kg 575 g

(j) 7000

Question 4.

Find the sum of:

(a) 3 kg 520 g, 7 kg 95 g and 11 kg

Answer:

21 kg 615 g

(b) 11m 70 cm, 9 m 95 cm and 16 m 2 cm

Answer:

37 m 67 cm

Question 5.

Find the difference of:

(a) 49 kg and 31 kg 286 g

Answer:

17kg 714 g

(b) 13l 479 ml and 9l 293 ml

Answer:

4l 186 ml

Question 6.

A basket contained 65 kg 750 g of fruits. Out of which 42 kg 150 g are apples, 9 kg 750 g are pears and rest are mangoes. Find the weight of mangoes.

Answer:

To get the wt. of mangoes, we have to subtract the wt. of apples and pears from total wt.

13 kg 850 g of mangoes.

Question 7.

A tall tower is painted in red, white and black colour, 25 m 50 cm is painted black, 15 m 75 cm is painted red and 10 m 25 cm is painted white. Find the height of the tower.

Answer:

To get total height we have to add the length of colours. m cm

Length of black colour = 25m 50cm

Length of red colour = 15m 75cm

Length of white colour = 10m 25cm

Height of tower = 51 m 50 cm

51 m 50 cm is the height of tower.

Question 8.

For a family of three, how much of each given item would you buy for one meal? Circle your answer.

Answer:

Paneer – 600 g

Potatoes – 400 g

Additional Questions

Question 1.

Convert the following into millilitres.

(a) 19 l 10 ml

Answer:

19 1 10 ml

= 19 × 1000 ml + 10 ml

= 19010 ml

(b) 90 l

Answer:

= 90 × 1000

= 90,000 ml

(c) 101 l 37 ml

Answer:

= 101 × 1000ml + 37 ml

= 101037 ml

Question 2.

Convert the following into litres.

(a) 177800 ml

(b) 7580 ml

(c) 90003 ml

Answer:

(a) 177800 ml

= 177800 – 1000 l

= 177 l 800 ml

(b) 7580 ml

= 7580 – 1000 l

= 7 1 580 ml

(c) 90003 ml

= 90003 ÷ 1000

= 90 1 3 ml

Question 3.

Add:

(a) 126 1 26 ml and 39 1 36 ml

Answer:

165l 062 ml

(b) 60 1 7 ml and 80 1 230 ml

Answer:

140l 237 ml

(c) 76 1 152 ml, 36 1 56 ml and 50 1 36 ml

Answer:

162l 244 ml

Question 4.

Subtract:

(a) 36 l 56 ml and 96 l 78 ml

Answer:

60l 022 ml

(b) 156 l 840 ml and 130 l 970 ml

Answer:

25l 870 ml

(c) 15 l 480 ml and 96 l 20 ml

Answer:

80 l 540 ml.

Question 5.

A shopkeeper ordered for 90 l 70 ml of milk. But he received only 87 1 26 ml of milk. Due to leakage in packet of milk, some milk got wasted. Find the amount of milk got wasted.

Answer:

To get wasted milk we have to subtract

Quantity of milk ordered = 90l 070ml

Quantity of milk he received = 87l 026ml

Milk got wasted = 3l 044 ml

3 l 44 ml of milk.

Question 6.

Fill in the blanks.

(a) 72 l 36 ml = __________ ml

Answer:

72036

(b) Unit of measuring petrol = __________

Answer:

Litre

(c) The smallest unit of capacity = __________

Answer:

millilitre

(d) The biggest unit of capacity = __________

Answer:

kilolitres.