RS Aggarwal Class 7 Mathematics Third Chapter Decimals Exercise 3D Solution
EXERCISE 3D
(1) Divide:
(i) 131.6 by 10 = 13.16
(ii) 32.56 by 10 = 3.256
(iii) 4.38 by 10 = 0.438
(iv) 0.34 by 10 = 0.034
(v) 0.08 by 10 = 0.008
(vi) 0.062 by 10 = 0.0062
(2) Divide:
(i) 137.2 by 100 = 1.372
(ii) 23.4 by 100 = 0.234
(iii) 4.7 by 100 = 0.047
(iv) 0.3 by 100 = 0.003
(v) 0.58 by 100 = 0.0058
(vi) 0.02 by 100 = 0.0002
(3) Divide:
(i) 1286.5 by 1000 = 1.2865
(ii) 354.16 by 1000 = 0.35416
(iii) 38.9 by 1000 = 0.0389
(iv) 4.6 by 1000 = 0.0046
(v) 0.8 by 1000 = 0.0008
(vi) 2 by 1000 = 0.002
(4) Divide:
(5) Divide:
(6) Divide:
(7) Divide:
(8) The total cost of 24 chairs is Rs 9255.60. Find the cost of each chair.
Solution: Cost of each chair = Rs (9255.60 รท 24) = Rs 385.65
(9) 1.8 m of cloth is required for a shirt. How many such shirts can be made from a piece of cloth 45 m long?
(10) A car covers a distance of 22.8 km in 2.4 litres of petrol. How much distance will it cover in 1 litre of petrol?
(11) A tin holds 16.5 litres of oil. How many such tins will be required to hold 478.5 litres of oil?
Therefore, 29 tins will be required to hold.
(12) The weight of 37 bags of sugar is 3644.5 kg. If all the bags weigh equally, what is the weight of each bag?
Hence, 98.5 kg is the weight of each bag.
(13) If 69 buckets of equal capacity can be filled with 586.5 litres of water, what is the capacity of each bucket?
(14) Monica cuts 46 m of cloth into pieces of 1.15 m each. How many pieces does she get?
(15) Mr Soni bought some bags of cement, each weighing 49.8 kg. If the total weight of all the bags is 1792.8 kg, how many bags did he buy?
(16) How many pieces of plywood, each 0.35 cm thick, are required to make a pile 1.89 m high?
(17) The product of two decimals is 261.36. If one of them is 17.6, find the other.
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