Worksheet on Weight

Solved Questions on Weight

1. The weight of a thin boy is 45 kg less than that of a fat boy. What is the weight in hectograms of a fat boy if the weight of a thin boy is 42 kg?

a) 8.7 hg
b) 87 hg
c) 870 hg
d) 8700 hg

Answer: c) 870 hg

Explanation: Weight of a thin boy = 42 kg

Weight of a thin boy is 45 kg less than that of a fat boy. Hence, the weight of a fat boy is 45 kg more than that of a thin boy.

Weight of a fat boy = 42 + 45
                             = 87 kg

[Note: 1 kg = 10 hg]

Weight of a fat boy in hectograms (hg) = 87 × 10
                                                         = 870 hg

2. Each bottle weighs 390 grams. What is the total weight of three dozen similar bottles?

a) 14 kg 40 g
b) 14 kg 400 g
c) 14 kg 44 g
d) 14 kg 440 g 

Answer: a) 14 kg 40 g

Explanation: Weight of one bottle = 390 g

Note: 1 dozen = 12

Weight of three dozen (36) similar bottles = 390 × 36
                                                              = 14040 g
                                                               = 14000 g + 40 g
                                                                = (14000⁄1000) + 40g
                                                                 = 14 kg 40 g

3. What is the weight of a score of balls in grams if the weight of each ball is 1400 milligrams?

a) 14 g
b) 28 g
c) 140 g
d) 280 g

Answer: b) 28 g

Explanation: Weight of a ball = 1400 mg

Note: 1 score = 20

Weight of a score (20) of balls = 1400 × 20
                                             = 28000 mg

Weight of a score (20) of balls in grams = 28000⁄1000
                                                          = 28 g

4. The weight of a laptop is 1800 decigrams. What is the weight in decagrams of the four such laptops?

a) 18 dag
b) 36 dag
c) 72 dag
d) 108 dag

Answer: c) 72 dag

Explanation: Weight of 1 laptop = 1800 decigrams (dg)

Weight of 1 laptop = 1800⁄100
                            = 18 decagrams (dag)

Weight of 4 laptops = 18 × 4
                             = 72 dag

5. Fill up the blank: 40 × 5.2 hg = _________cg

a) 0.0208 cg
b) 0.208 cg
c) 208 cg
d) 2.08 cg

Answer: a) 0.0208 cg

Explanation: 40 × 5.2 hg
= 208 hg
= 208⁄10000
= 0.0208 cg