The value of a flat worth Rs. 500000 is depreciating, at the rate of 10% p.a. In how many years will it' value be reduced to Rs. 364500? `3\ y e a r s` b. `4\ y e a r s` c. `5\ y e a r s` d. `6\ y e a r s`

The present ages of a mother and her son are I the ratio 11:5. When the son becomes a sold as his mother is now, then the ratio of his fathers age to that of his mother is 19:17. When the son becomes as old as his father is now, then the sum of his fathers age and his age will be 170 years. What is the fathers present age? 52 y e a r s b. 60 y e a r s c. 65 y e a r s d. 70 y e a r s

One year ago the ratio of the ages of Sarika and Gouri as 3:4 respectively. One year hence the ratio of their ages will be 10 :13 respectively. What is Sarika's present age? 18\ y e a r s b. 20\ y e a r s c. 26\ y e a r s d. cannot be determine e. none of these

The r.m.s value of alternating e.m.f. is

Given that carbon-14 decays at a constant rate in such a way that it reduces to 50% in 5568 years, find the age of an old wooden piece in which the carbon is only 12.5% of the original. 15836 y e a r s b. 16668 y e a r s c. 16704 y e a r s d. 17552 y e a r s

The value of a fixed asset depreciates at the rate of 10% of the value at the beginning of each year. If the value of the asset, two years ago, was Rs. 12000 more than the value of the asset one year ago, then find the present value of the asset, given that the asset was bought two years ago. R s .145200 b. R s .17520 c. R s .96000 d. R s .97200

A car covers a distanced of 432 km at the speed of 48 km/hr. In how many hours will the car cover this distance? 6 hou r s b. 7 hou r s c. 9 hou r s d. 12 hou r s e. none of these

The present value of an optical instrument is Rs. 20000. If its value will depreciate 5% in the first year, 4% in the second year and 2% in the third year, what will be its value after 3 years? R s .16534.5 b. R s .16756.5 c. R s .17556.8 d. R s .17875.2

If P=Rs 8000, r= 20%, T=1 year then find the value of C.I-S.I

A train running at the speed of 60 kmph crosses a 200 m long platform in 27 seconds. What is the length of the train ? 200 m e t r e s b. 240 m e t r e s c. 250 m e t r e s d. 450 m e t r e s e. none of these

A 50 metre long train passes over a bridge at the speed of 30 km per hour. If it takes 36 seconds to cross the bridge, what is the length of the bridge? 200 m e t r e s b. 250 m e t r e s c. 300 m e t r e s d. 350 m e t r e s