The document RD Sharma Solutions -Page No.9.18, Ratio Proportion And Unitary Method, Class 6, Maths Class 6 Notes | EduRev is a part of the Class 6 Course RD Sharma Solutions for Class 6 Mathematics.

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**Question 1: The price of 3 metres of cloth is Rs 79.50. Find the price of 15 metres of such cloth.**

**ANSWER: **Price of 3 metres of cloth = Rs. 79.50

Price of 1 metre of cloth = 79.50/3 = Rs.26.5

Price of 15 metres of cloth = 26.5Ã—15 = Rs. 397.50

**Question 2: The cost of 17 chairs is Rs 9605. Find the number of chairs that can be purchased in Rs 56500.**

**ANSWER: **Number of chairs purchased for Rs. 9,605 = 17

Number of chairs purchased for Rs. 1 = 17/9605

Number of chairs purchased for Rs. 56,500

**Question 3: Three ferryloads are needed to carry 150 people across a river. How many people will be carried on 4 ferryloads?**

**ANSWER: Number of people needed to carry 3 ferryloads across a river = 150**

**Number of people needed to carry 1 ferryload across a river =** 150/3 = 50

Number of people needed to carry 4 ferryloads across a river = 50Ã—4 = 200

**Question 4: If 9 kg of rice costs Rs 120.60, What will 50 kg of such a quality of rice cost?**

**ANSWER: **Cost of 9 kg rice = Rs. 120.60

Cost of 1 kg rice = 120.60/9 = Rs. 13.4

Cost of 50 kg rice = 13.4Ã—50= Rs. 670

**Question 5: A train runs 200 kilometres in 5 hours. How many kilometres does it run in 7 hours**

**ANSWER: **Distance covered by the train in 5 hours = 200 km

Distance covered by the train in 1 hour = 200/5 = 40 km

Distance covered by the train in 7 hours = 40Ã—7 = 280

**Question 6: 10 boys can dig a pitch in 12 hours. How long will 8 boys take to do it?**

**ANSWER: **It is given that 10 boys can dig a pitch in 12 hours.

Therefore, time taken by one boy to dig the pitch = 10Ã—12 = 120 hours

Thus, time taken by 8 boys to dig the same pitch = 120/8 = 15 hours

**Question 7: A man can work 8 hours daily and finishes a work in 12 days. If he works 6 hrs daily, in how many days will the same work be finished?**

**ANSWER: **It is given that a man can work for 8 hours daily and finishes a work in 12 days.

Therefore, time taken by the man to finish the total work = 8Ã—12=968Ã—12=96 hours

If he works for 6 hours daily, the number of days required to finish the total work = 96/6 =16 days

**Question 8: Fifteen post cards cost Rs 2.25. What will be the cost of 36 post cards? How many postcards can we buy in Rs 45?**

**ANSWER:** Cost of 15 postcards = Rs. 2.25

Cost of 1 postcard = Rs. 2.25/15

Cost of 36 postcards

Number of postcards purchased in Rs. 1 = 15/2.25

Number of postcards purchased in

**Question 9: A rail journey of 75 km costs Rs 215. How much will a journey of 120 km cost?**

**ANSWER:** Cost of a rail journey of 75 km = Rs. 215

Cost of a rail journey of 1 km = Rs. 215/75

Cost of a rail journey of 120 km

**Question 10: If the sales tax on a purchase worth Rs 60 is Rs 4.20. What wil be the sales tax on the purchase worth Rs 150?**

**ANSWER:** Sales tax on a purchase worth Rs. 60 = Rs. 4.20

Sales tax on a purchase worth Rs. 1 = Rs. 420/60

Sales tax on a purchase worth Rs. 150