20 boys and 25 girls from a group of social workers. During their membership drive, the same number of boys and girls joined the group (eg, if 7 boys joined, 7 girls joined). How many members does the group have now, if the ratio of boys to girls is 7: 8?

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20 boys and 25 girls from a group of social workers. During their membership drive, the same number of boys and girls joined the group (eg, if 7 boys joined, 7 girls joined). How many members does the group have now, if the ratio of boys to girls is 7: 8?

A75

B65

C70

D60

Nithin ? Aug 11 '2022 at 21:43

Correct answer is: 75

Explanation:

Let the no. of increased boys and girls be x each
Thus \(\frac{(20 + x)}{(25 + x)} = \frac{7}{8}\)
Thus x = 15
Hence number of members of group = 20 + 15 + 25 + 15 = 75

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Samir drove at the speed of 45 kmph. from home to a resort. Returning over the same route, he got stuck in traffic and took an hour longer, also he could drive only at the speed of 40 kmph. How many kilometres did he drive each way ?

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Samir drove at the speed of 45 kmph. from home to a resort. Returning over the same route, he got stuck in traffic and took an hour longer, also he could drive only at the speed of 40 kmph. How many kilometres did he drive each way ?

A250 kms.

B300 kms.

C360 kms.

D275 kms.

ranjith ? Feb 23 '2020 at 21:38

Correct answer is: 360

Explantion:

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