help pls!!!

[swapna]

If cement,gravel and sand are to be mixed in the ratio 3:5:7 respectively and 5 tons of cement are available, how many tons of mixture can be made?(Assume there is enough gravel and sand available to use all the cement)
15
20
25
30
75

ans c..can some one help??

[sanju09]

If cement,gravel and sand are to be mixed in the ratio 3:5:7 respectively and 5 tons of cement are available, how many tons of mixture can be made?(Assume there is enough gravel and sand available to use all the cement)
15
20
25
30
75

ans c..can some one help??

When 3 tons of cement was there, 15 tons of mixture was possible to prepare. Hence, if there is 5 tons of cement available, [spoiler]25[/spoiler] tons of mixture can be made.

[spoiler]C[/spoiler]