 # NCERT Solutions Class 8 Mathematics Solutions for Exercise 13.1 in Chapter 13 - Direct and Inverse Proportions

Rashmi has a road map with a scale of 1 cm representing 18 km. She drives on a road for

72 km. What would be her distance covered on the map?

Solution:

Let the distance covered in the map be x. Video transcript
"hello students i am rita umass lito tutor and the today's question is rashmi has a road map with a scale of one centimeter representing 18 kilometer she drives on a road for 72 kilometer what would be her distance covered on the map so there are two distance one is actual distance and the other is one is actual distance and the other is distance on map distance on map so there are two distance actual distance rashmi has a road map with a scale of one centimeter representing 18 kilometer so actual distance is 18 kilometer and actual distance is 18 kilometer and distance on map is one centi meter and she drives on a road for 72 kilometer actual distance is 72 kilometer and we have to find her distance covered on map that we can take up x okay we let it be x so obviously it is a case of direct proportion it is a case of direct proportion it is a case of direct proportion or we can save variation it is a case of direct proportion and in direct proportion x by y is equal to okay constant okay now we apply this formula 18 by 1 is equal to 72 by x now we cross multiply each other we cross multiply each other then we get an equation 18 multiply x is equal to 72 multiply one so the value of x is 72 divided by 18. now 18 and 18 fours up so x is equal to 4 70 meter so this is our answer i hope you like this video so please subscribe video for more updates and do comment your questions thank you "
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