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Sep 29, 2013



May 5, 2014

ax+by=c            and ay+bx=c+1        find the value of x and y



Given equations are  ax+by = c  --------------(1)  and  ay+bx = c+1  --------------(2)
multiply  equation (1) by 'b' and  equation (2)  by 'a' we g...

Dec 24, 2013

Heena has only Rs2 and Rs5 coins in her purse. If in all she has 80 coins in her purse amounting to Rs232, Find the number of Rs5 coins.



Given total number of coins = 80
Let the number of Rs 2 coins be x
Therefore number of Rs 5 coins = (80 â€“ x)
Total amount in the purse = R...

Jan 17, 2014

mensuration



volume of wood=84*75*64
=403200cm3
dimensions of inner wood because to cal...

Dec 16, 2012

A cuboidal tank has a length of 30cm, a breadth of 20cm and a height of 20cm.The tank is placed on a horizontal table and it is three-quarters full of water. Find the area of the tank which is in contact with water.



Height of tank in contact with water=3/4*20=15cm
Area of four walls of tank in contact with water=2(l b)*h=2(30 20)*15=2*50*15=1500 sq...

Dec 23, 2013

A purse contains Rs550 in notes of denominations of  Rs10 and Rs50. If the number of Rs50 notes is Rs1 less than that of  Rs10 notes,then find the number of  Rs50 notes?



let,no.of Rs10 note be X so,no. of Rs50 note=X-1 value of 10RS note=X*10=10X value of Rs50 note=50(X-1)=50X-50 so, 10X+50X-50=550 60X-50=550 60X=550+50 60X=600 x=600/60=10 no of Rs10 note=10 so no of Rs...

Jan 26, 2015



36km/h

Feb 24, 2014



Jul 20, 2013



12