xil) আগাছানাশক হিসাবে ব্যবহৃত হয়- ।
a] ডালপালা b] ম্যাঙ্কোজেব c] প্যারিসগ্রীন d] ফলিডল
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Explanation:
1 hour = 60 mins
4 hours = 4 x 60 mins
= 240 mins
Ratio :
= 40 mins : 4 hrs
= 40 mins : 240 mins
= 4 : 24
= 1 : 6
Therefore, the required ratio is 1:6.
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