Q8 - Cost of 90 envelopes is Rs.13.50
How many envelopes
can be
bought for Rs.10.50
Answers
Answer:
1. Cost of 15 envelopes = 10.5 rupees
Cost of 1 envelope = 10.5/15 = 0.7
At Rs 70 no. of envelope can be bought = 70/.7 = 100
Cost of 35 envelope = 35×0.7
= 24.5 Rs
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2. (i) In 15 month he earn = 18000
In 1 month he will earn = 18000/15
= 1200 Rs
In 7 month he will earn = 8400 Rs
(ii) He will earn 30000 in = 30000/1200
= 25 months
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3. 25 bags of wheat contain 25 × 40 kg of wheat.
= 1000 kg of wheat.
Cost of 1000kg wheat = 7750
Therefore cost of 1 kg = 7750/1000
= 7.75 Rs
36 bags of wheat contain = 36×50
= 1800kg of wheat
therefore cost of 36 bag(1800kg) =
1800×7.75
= 13950 Rs
_______________________________
4. Speed of bus = Distance/time
= 36/40
= 0.9 km/ min
To cover 162 km it will take = 162/0.9
= 180min or 3 hour
8 hr = 480 min
Therefore in 8 hr it will cover = 480×0.9
= 432 km
Hope it helps.
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Step-by-step explanation:
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Answer:
70
Step-by-step explanation:
No of Envelopes per Rs. 13.50 = 90
No of Envelope per 10.50 = 90/13.50 ×10.50 =70