NCERT Exemplar Solutions
Class 6 - Mathematics - Unit 7: AlgebraFill in the Blanks
Class 6 - Mathematics - Unit 7: Algebra
Question. 24
The distance (in km) travelled in h hours at a constant speed of 40 km per hour is _________.
Answer:
The distance (in km) travelled in h hours at a constant speed of 40 km per hour is 40h.
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Question. 25
p kg of potatoes are bought for Rs 70. Cost of 1 kg of potatoes (in Rs) is _________.
Answer:
p kg of potatoes are bought for Rs 70. Cost of 1 kg of potatoes (in Rs) is 70/p.
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Question. 26
An auto rickshaw charges Rs 10 for the first kilometre then Rs 8 for each such subsequent kilometre. The total charge (in Rs) for d kilometres is _________.
Answer:
The total charge (in Rs) for d kilometres is 10 + 8(d – 1).
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Question. 27
If 7x + 4 = 25, then the value of x is _________.
Answer:
If 7x + 4 = 25, then the value of x is 3.
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Question. 28
The solution of the equation 3x + 7 = –20 is _________.
Answer:
The solution of the equation 3x + 7 = –20 is –9.
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Question. 29
‘x exceeds y by 7’ can be expressed as _________.
Answer:
‘x exceeds y by 7’ can be expressed as x = y + 7.
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Question. 30
‘8 more than three times the number x’ can be written as _________.
Answer:
‘8 more than three times the number x’ can be written as 3x + 8.
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Question. 31
Number of pencils bought for Rs x at the rate of Rs 2 per pencil is _________.
Answer:
Number of pencils bought for Rs x at the rate of Rs 2 per pencil is x/2.
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Question. 32
The number of days in w weeks is _________.
Answer:
The number of days in w weeks is 7w.
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Question. 33
Annual salary at r rupees per month along with a festival bonus of Rs 2000 is _________.
Answer:
Annual salary at r rupees per month along with a festival bonus of Rs 2000 is 12r + 2000.
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Question. 34
The two digit number whose ten’s digit is ‘t’ and units’s digit is ‘u’ is _________.
Answer:
The two digit number whose ten’s digit is ‘t’ and units’s digit is ‘u’ is 10t + u.
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Question. 35
The variable used in the equation 2p + 8 = 18 is _________.
Answer:
The variable used in the equation 2p + 8 = 18 is p.
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Question. 36
x metres = _________ centimetres.
Answer:
x metres = 100x centimetres.
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Question. 37
p litres = _________ millilitres.
Answer:
p litres = 1000p millilitres.
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Question. 38
r rupees = _________ paise.
Answer:
r rupees = 100r paise.
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Question. 39
If the present age of Ramandeep is n years, then her age after 7 years will be _________.
Answer:
If the present age of Ramandeep is n years, then her age after 7 years will be n + 7.
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Question. 40
If I spend f rupees from 100 rupees, the money left with me is _________ rupees.
Answer:
If I spend f rupees from 100 rupees, the money left with me is 100 – f rupees.