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A wall can be painted either by using 30 cans of Brand $A$ paint or 50
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16 Jun 2025, 05:38
16 Jun 2025, 05:38
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66% (02:37) correct
33% (03:12) wrong based on 6 sessions
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A wall can be painted either by using 30 cans of Brand $A$ paint or 50 cans of Brand $B$ paint. If $x$ cans of Brand $A$ and 30 cans of Brand $B$ are required to paint the wall, what is the value of $x$ ?
(A) 30
(B) 24
(C) 20
(D) 18
(E) 12
(A) 30
(B) 24
(C) 20
(D) 18
(E) 12
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Re: A wall can be painted either by using 30 cans of Brand $A$ paint or 50
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16 Jun 2025, 06:36
16 Jun 2025, 06:36
4
given
30A=50B,
and X number of A and 30B has to paint,
we can denote A in terms of B,
30A=50B,
A=50/30 B
now XA+30B is doing the work which is done by either 30A or 50B,
hence we can do,
XA+30B=50B or in terms of A we can do XA+30B=30A,
X*50/30B +30B=50B,
on solving we get X=12
30A=50B,
and X number of A and 30B has to paint,
we can denote A in terms of B,
30A=50B,
A=50/30 B
now XA+30B is doing the work which is done by either 30A or 50B,
hence we can do,
XA+30B=50B or in terms of A we can do XA+30B=30A,
X*50/30B +30B=50B,
on solving we get X=12
gmatclubot
Re: A wall can be painted either by using 30 cans of Brand $A$ paint or 50 [#permalink]
16 Jun 2025, 06:36
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