The cost of a watch and pen is Rs. 140. If the cost of watch is six times than that of pen, then what will be the cost of watch?
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Let the cost of the watch is x and the cost of the pen is y. Just an assumption.
Given x=6y
Also x+y=140
substitute x=6y in x+y=140
y=20
x=120
The cost of watch is 120 and cost of pen is 20.
Given x=6y
Also x+y=140
substitute x=6y in x+y=140
y=20
x=120
The cost of watch is 120 and cost of pen is 20.
simrankaur6:
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Let the cost of watch =x then the cost of pen =6x then x+6x=140 then 7x=140 then x=140/7 then x=20 (cost of watch) 6x=6×20=120 (cost of pen)
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Answered by
7
let the cost of watch be x
and cost of pen ne 140-x
a/q
x=6(140-x)
x=840-6x
x+6x=840
7x=840
x=840/7
x=120
•cost of watch(x)=₹120
and cost of pen ne 140-x
a/q
x=6(140-x)
x=840-6x
x+6x=840
7x=840
x=840/7
x=120
•cost of watch(x)=₹120
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