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