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RS Aggarwal Solutions Class 7 Mathematics Solutions for Unitary Method Exercise 9A in Chapter 9 - Unitary Method

Question 7 Unitary Method Exercise 9A

A train covers a distance of 51 km in 45 minutes. How long will it take to cover 221 km?

Answer:

Solution:-

From the question,

Time is taken by the train to covers a distance of 51 km = 45 minutes

Time is taken by the train to cover a distance of 1 km = (45/51) minutes

∴Time is taken by the train to cover 221 km = (45/51) × (221)

= 195 minutes

∴Time taken by the train to cover 221 km is 3hour 15 minutes

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