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The price of 3 meters of cloth = Rs 79.50
Let the price of 15m cloth be x
Then,
By cross multiplication, we get
⟹ x = 5 × 79.50
⟹ x = Rs 397.50
Cost of 17 chairs = Rs 9605
Number of chairs purchased
= 100 chairs.
Three ferry loads carry = 150 people
one ferry load carry = 150/3 people
= 50 people
Number of peoples can be carried by 4 ferryloads = 50 × 4
= 200 people.
9 kg rice cost 120.60
50 kg cost = ?
1 kg rice cost = 120.60/9
= 13.4
50 kg rice cost = 13.4 × 50
= 670
∴ 50 kg rice cost = Rs. 670
Train runs 200 km in 5 hours.
Train runs in one hour = 200/5 km
= 40 km
∴ No of Kms does it run in 7 hrs = 7 × 40 km
= 280 km
10 boys can dig a pitch in 12 hours.
8 boys can dig pitch in x hrs
one boy can dig pitch in = 12 × 10 = 120 hrs
8 boys can dig pitch in = 120/8
= 15 hrs.
Daily 8 hours → work finishes in 72 days.
6 hrs daily → ?
Daily one hour = 12 × 8 = 96 days
No of day will take 6 hrs daily works = 96/6 = 16 days.
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Chapter 9: Ratio, Proportion and Unitary Method...