(i) 54 m = ____ cm
Ans: 5400 cm.
Explanation: 1 m = 100 cm, so 54 × 100 = 5400 cm.
(ii) 55 m = ____ cm
Ans: 5500 cm.
Explanation: 55 × 100 = 5500 cm.
(iii) 69 m = ____ cm
Ans: 6900 cm.
Explanation: 69 × 100 = 6900 cm.
(iv) 63 m = ____ mm
Ans: 63000 mm.
Explanation: 1 m = 1000 mm, so 63 × 1000 = 63000 mm.
(v) 53 cm = ____ mm
Ans: 530 mm.
Explanation: 1 cm = 10 mm, so 53 × 10 = 530 mm.
(i) 7 km = ____ m
(ii) 2 km 500 m = ____ m
(iii) 15 km 305 m = ____ m
(iv) 9 km 50 m = ____ m
Sol:
(i) 7 km = 7 × 1000 m = 7000 m.
(ii) 2 km 500 m = (2 × 1000) + 500 = 2000 + 500 = 2500 m.
(iii) 15 km 305 m = (15 × 1000) + 305 = 15000 + 305 = 15305 m.
(iv) 9 km 50 m = (9 × 1000) + 50 = 9000 + 50 = 9050 m.
Q3: Multiple Choice Questions (MCQs).
(i) Circle the longest box.
(a)
(b)
(c)
(d)
Ans: (d)
Explanation: Option (d) is the longest because its length is greater than the lengths of the other boxes shown.
(ii) Which city has the farthest distance point X?

(a) City A
(b) City B
(c) City C
(d) City D
Ans: (c)
Explanation: City C is farthest from point X because the distance marked for City C is the largest compared to the others.
(a) 10 m = ____ cm
(b) 50 m = ____ cm
Ans:
(a) 1000 cm.
(b) 5000 cm.
Explanation: 1 m = 100 cm, so multiply metres by 100 to get centimetres.
(i) Complete the table

Sol:

(ii) A room has 6 m length and 4 m breadth. What is the perimeter of the room?
(a) City A
(b) City B
(c) City C
(d) City D
Sol:
Length = 6 m.
Breadth = 4 m.
Perimeter of rectangle = 2 × (length + breadth).
Perimeter = 2 × (6 + 4) = 2 × 10 = 20 m.
(iii) How much money does Renu have if she has 5 (₹ 10 notes) + 3 (₹ 50 notes) + 10 (₹ 100 notes)?

Sol:
Money from five ₹10 notes = 5 × 10 = ₹ 50.
Money from three ₹50 notes = 3 × 50 = ₹ 150.
Money from ten ₹100 notes = 10 × 100 = ₹ 1000.
Total = 50 + 150 + 1000 = ₹ 1200.
(iv) Find the perimeter of the given figure.

Sol:
The shape is a square with each side = 100 m.
Perimeter of a square = 4 × side length.
Perimeter = 4 × 100 = 400 m.
(v) Ram is 1 m 23 cm tall. Seeta is 12 cm shorter than Ram. What is their total height?
Total height = 123 cm + 111 cm = 234 cm = 2 m 34 cm.(vi) Find the total distance covered by Mohan from home to school.

Sol:
Total distance covered = 5 km + 1 km + 8 km + 4 km = 18 km.

(vii) Ram is 150 cm tall, and his sister Teena is 115 cm tall. Who is taller and by how many cms?
Sol:Height of Ram = 150 cm.
Height of Teena = 115 cm.
Hence, Ram is taller than Teena by 35 cm.
(viii) Using a ruler, draw lines of the following measurements
(a) 7.7 cm
(b) 6.5 cm
Sol: Students should draw these lines themselves using a ruler: one line of 7.7 cm and another of 6.5 cm.
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