alleryમીના 18 દિવસમાં અને ગીતા 9 દિવસમાં એક વાડને રંગી શકે છે. જો તેઓ સાથે મળીને કામ કરે, તો વાડ કેટલા સમયમાં રંગાઈ જશે?
A5 દિવસ
B6 દિવસ
C7 દિવસ
D8 દિવસ
Answer & Solution
Correct answer: B. 6 દિવસ
સાથે મળીને તેઓ દરરોજ વાડનો 1/18 + 1/9 = 3/18 = 1/6 ભાગ રંગે છે, તેથી 6 દિવસ લાગશે.
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