Paper 1 · Mathematical Reasoning and Aptitude
Ravi cycled 10 km south, turned right and cycled 5 km, then again turned right and cycled 10 km, then turned left and cycled 10 km. How far must he cycle straight to reach home?
A15 ✓ Correct
B20
C25
D30
Correct answer: (A) 15 — He must cycle 15 km straight, so that is the answer.
Explanation
★He must cycle 15 km straight, so that is the answer.
★Going 10 km south and later 10 km north cancels the vertical movement to zero.
★Turning right from south makes him go west by 5 km.
★After the north leg he turns left and goes a further 10 km west.
★So he is 5 plus 10, which is 15 km, to the west of home.
★So he must cycle 15 km straight to reach home.
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