Subject
Quantitative Aptitude
Topic
Speed & Distance
A is 10 miles west of B. C is 30 miles north of B. D is 20 miles east of C. What is the distance from A to D?(A, B এর মাইল পশ্চিমে; C, B- এর মাইল উত্তরে এবং D, C- এর ২০ মাইল পূর্বে অবস্থিত হলে A হতে D এর দূরত্ব কত ?)
A is 10 miles west of B. C is 30 miles north of B. D is 20 miles east of C. What is the distance from A to D?(A, B এর মাইল পশ্চিমে; C, B- এর মাইল উত্তরে এবং D, C- এর ২০ মাইল পূর্বে অবস্থিত হলে A হতে D এর দূরত্ব কত ?)
ক)
10 milesখ)
30 milesগ)
10√10 milesঘ)
10√13 milesঙ)
30√2 milesExplanation
A ও D যোগ করি । এবার, AB কে O পর্যন্ত বর্ধিত করি এবং AO এর উপর OD লম্ব আঁকি । AO = AB + BO = 10 + 20 = 30 AOD সমকোণী ত্রিভুজে, AD 2 = AO 2 + OD 2 = 30 2 + 30 2 = 900 + 900 ∴ AD = √1800 = √(900×2) = 30√2 [ ∴ √900 = 30 ]Related questions
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