Ex 13.1, 6 In a model of a ship, the mast is 9 cm high, while the mast of the actual ship is 12 m high. If the length of the ship is 28 m, how long is the model ship?
Given,
Mast of model ship is 9 cm high if mast of actual ship is 12m high.
Let length of model ship be x cm if length of actual ship is 28 cm.
Thus, our table looks like
Now, as Length in actual ship increases,
Length in model ship also increases.
∴ Length in model ship and in actual ship are in direct proportion.
9/12 = 𝑥/28
9/12 × 28 = 𝑥
3/4 × 28 = 𝑥
3 × 7 = 𝑥
21 = 𝑥
𝑥 = 21
∴ Length of model ship is 21 m

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.

Hi, it looks like you're using AdBlock :(

Displaying ads are our only source of revenue. To help Teachoo create more content, and view the ad-free version of Teachooo... please purchase Teachoo Black subscription.

Please login to view more pages. It's free :)

Teachoo gives you a better experience when you're logged in. Please login :)

Solve all your doubts with Teachoo Black!

Teachoo answers all your questions if you are a Black user!