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ICSE Class 9 Answered

A square brass plate of side x cm is 1mm thick and weighs 4725g.if 1cc of brass weighs 8.4g,find x
Asked by Sunita | 14 Mar, 2018, 07:22: AM
answered-by-expert Expert Answer
begin mathsize 16px style Side space of space straight a space square space plate equals straight x space cm Thickness space of space straight a space square space plate equals 1 space mm Total space weight space of space square space plate equals 4725 space gm Weight space of space 1 space cc equals 8.4 space gm rightwards double arrow Volume space of space plate equals fraction numerator 4725 over denominator 8.4 end fraction space cm cubed equals 562.5 space cm cubed Also comma space volume space of space square space plate equals straight x cross times straight x cross times 1 over 10 equals straight x squared over 10 space cm cubed rightwards double arrow straight x squared over 10 equals 562.5 rightwards double arrow straight x squared equals 5625 rightwards double arrow straight x equals 75 space cm end style
Answered by Rashmi Khot | 14 Mar, 2018, 08:59: AM

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