alleryকাম P আৰু Q 4 আৰু 6 h লয় আৰু একেলগে দৌৰিব পাৰে; R দুয়োটাৰ পিছত 3 h লয়। নূন্যতম মুঠ?
A9 h
B8 h
C7 h
D13 h
Answer & Solution
Correct answer: A. 9 h
P আৰু Q একেলগে দৌৰিবলৈ 6 ঘণ্টা সময় লাগে, তাৰ পিছত R ৰ 3 ঘন্টা, মুঠ 9 ঘন্টা।
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