উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।
ব্যাখ্যা ও সঠিক সমাধান
উত্তর:
6
As usual the number of digit to the right of a product of decimal system is the total number of digits to the right of the numbers. Here to the right of decimal point the number of digit is 7. But last two digit of the numbers are 5 and 4. Their product is (…5 x … 4 = … 20),20 which has a zero at the end. So, the number is 6.