Each boy contributed money equal to the number of girls and each girl contributed money equal to the number of boys in a class of 60 students. If the total contribution thus collected is Tk. 1,600, how many boys are there in the class?
Created: 6 years ago |
Updated: 3 years ago
best des
Hints: ছেলেদের সংখ্যা x এবং মেয়েদের সংখ্যা y হলে
x + y = 60................ (1)
এবং, xy + xy = 2xy = 1600
xy = 800
তাহলে, x - y = √(x + y)2 - 4xy
= √(60)2 - 4 × 800
x - y = 20............. (2)
(1) and (2) no equation
2x = 60 + 20
2x = 80
x = 40
Md Azizur Rahman
Founder of Satt
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