Question
The respective ratio of the present ages of A and B is
5:6. The present age of C is 20% more than that of B. The sum of the present ages of A, B and C is 91 years. What will be the ratio of the ages of A and B after 12 years?Solution
Let the present ages of A and B be 5x years and 6x years, respectively. Therefore, present age of C = 1.2 × 6 = 7.2x years According to the question, 5x + 6x + 7.2x = 91 18.2x = 91 Or, x = 91/18.2 = 5 Therefore, required ratio = (5x + 12):(6x + 12) = 37:42
Which of the following property of soil is not influenced by tillage operations?
White grub in maize can be controlled byÂ
The condition where the plant is unable to produce a zygote with its own pollen is called as?
Pseudo dominance is related with
____ is a milk process that makes milk more easily digested by those with a sensitive digestive system.
Which of the following elements has not been proved to be essential for plants?
Sedges are monocot with triangular stem and parallel venation and belong to ______ family.
When fruit develops from the mere stimulus of the pollination, but without fertilization it is known as_____
If the time shown in a clock is 8:20, then what will be the clock angle made by minute and hour hands?
A Chromosome with medium position of centromere is known as
